不定詞の名詞的用法 - 英文法を覚えよう
不定詞とはなにか？
不定詞は、動詞の形であり、「to＋動詞の原形」の形をしています。英語の文法では、不定詞はさまざまな役割を果たすことができます。今回はその中でも「名詞的用法」と呼ばれる不定詞の使い方について解説します。
名詞的用法の意味
不定詞の名詞的用法は、「〜すること」を意味します。つまり、不定詞は動詞の意味を持ちながらも、名詞として文中で機能する役割を果たします。
不定詞が文中で名詞として使用されることにより、さまざまな文型や表現を作り出すことができます。
例文：
- To study is important for academic success.（勉強することは学業の成功に重要です。）
- My dream is to become a doctor.（私の夢は医者になることです。）
以上が【不定詞とはなにか？及び、名詞的用法の意味】についての解説です。次に【名詞的用法の働き】について解説します。
名詞的用法の働き
不定詞の名詞的用法では、主語、補語、または目的語として文中で機能することがあります。
1. 主語としての不定詞
不定詞が文の主語となることがあります。この場合、不定詞は「〜すること」全体が主語として機能し、動作や状態を表します。
2. 補語としての不定詞
不定詞が動詞の補語として使用されることがあります。補語は、主語や目的語を補完し、動詞の意味を補完します。
3. 目的語としての不定詞
不定詞が動詞の目的語として使用されることがあります。この場合、不定詞は動詞の直接の目的を示します。
以上が【名詞的用法の働き】についての解説です。次に【名詞的用法の文、不定詞が主語】を解説します。
名詞的用法の文、不定詞が主語
不定詞が文の主語となる場合もあります。この場合、不定詞全体が主語として機能し、文の動作や状態を表現します。
例文：
- To eat a balanced diet is important for maintaining good health.（バランスのとれた食事を摂ることは健康を維持するために重要です。）
- To succeed requires hard work and dedication.（成功するには努力と献身が必要です。）
不定詞が主語となることで、具体的な行為や概念が主題として取り上げられ、文の重要な要素となります。
次に、【不定詞が補語の文】について解説いたします。
名詞的用法の文、不定詞が補語
不定詞が文中で動詞の補語として機能する場合もあります。補語は主語や目的語を補完し、動詞の意味を補完します。
例文：
- Her dream is to become a famous singer.（彼女の夢は有名な歌手になることです。）
- His goal is to win the championship.（彼の目標は優勝することです。）
不定詞が補語として使用されることで、主語の状態や目標が具体化され、文の意味が明確になります。
次に、【不定詞が目的語の文】について解説いたします。
名詞的用法の文、不定詞が目的語
不定詞が文中で動詞の目的語として機能することもあります。不定詞は、動詞の直接の目的を示します。
例文：
- I love to dance.（私は踊ることが好きです。）
- They decided to visit the museum.（彼らは博物館を訪れることを決めました。）
不定詞が目的語として使用されることで、具体的な行為や目的が示され、文の意味が明確になります。
以上で、不定詞の名詞的用法に関する解説が完了しました。皆さんにとって理解しやすく役立つ内容となっていれば幸いです。
| フォニックス |
|---|
| フォニックス発音練習【1】 短母音（A、E、I、O、U）、子音（B,K,D,F,G,H,J,L,M,N,P,Qu,R,S,T,V,W,X,Y,Z,softC,hardC,softG,hardG） |
| フォニックス発音練習【2】母音ペア（AI、AY、EI、IE、EA、EE、OA、OW、UE,UI、OI、OY、OU、OO、AU、AW）、Rが付いた母音（AR、ER、IR、UR、OR、ORE、EAR、AIR、ARE）、子音ダイヤグラフ（CH、SH、TH、CK、WH、GH、PH）、サイレントE |
| フォニックス発音練習【3】 子音ブレンド（BL,CL,FL,GL,PL,BR,CR,DR,FR,GR,PR,TR,SC,SK,SM,SN,SP,ST,SW,SQU,SCR,SPL,SPR,STR,THR） |
| 中学英単語 |
|---|
| 人称代名詞【1】 I, my, me, mine, you, your, you, yours, he, his, him, his, she, her, her, hers, it, its, it, we, our, us, ours, they, their, them, theirs |
| 代名詞【2】 this, these, that, those, myself, yourself, himself, herself, ourselves, everybody, somebody, nobody, everyone, someone, anyone, none, everything, something, anything, nothing, each, other, another, all, both |
| be動詞・助動詞・疑問詞【3】 be, am, are, is, was, were, do, dose, did, can, cannot, could, will, would, may, might, must, shall, should, have to, who, whose, whom, what, which, when, where, why, how, how many, how much, how old |
| 冠詞・間投詞・接続詞・省略形【4】 be, am, are, is, was, were, do, dose, did, can, cannot, could, will, would, may, might, must, shall, should, have to, who, whose, whom, what, which, when, where, why, how, how many, how much, how old |
| 前置詞【5】 about, above, across, after, against, along, around, as, at, before, behind, below, beside, between, among, by, down, during, except, for, from, in, to, into, of, on, onto, minus, near, outside, over, since, than, through, toward, under, until, up, upon, with, without |
| 名詞（数）【6】 zero, one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen, twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety, hundred, thousand, million |
| 名詞（曜日・月・Ac-Af）【7】 Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, January, February, March, April, May, June, July, August, September, October, November, December, accident, acid rain, action, active volcano, activity, actor, actress, address, adult, advantage, adventure, advice, affection, Africa, afternoon |
| 名詞（Ag-Ba）【8】 age, air, air conditioner, air pollution, airport, album, ambulance, America, American, amusement park, ancestor, anchor, animal, animation, ant, apple, architect, area, arm, art, artist, arts and crafts, Asia, assistance, astronaut, athlete, atomic bomb, attack, attention, aunt, Australia, autumn, baby, back |
| 名詞（Ba-Bo）【9】 backyard, badge, bag, ball, balloon, ballpark, bank, barrier, baseball, basketball, bath, bathroom, bazaar, beach, bear, beauty, bed, beginner, beginning, Beijing, belief, bicycle, bike, biotechnology, bird, birthday, blanket, blood, blossom, board, boat, body, bomb |
| 名詞（Bo-Ca）【10】 book, border, bottle, bottom, box, boy, boycott, braille, branch, Brazil, bread, breakfast, breath, breeze, bridge, British, broadcasting, brother, brotherhood, buffet, building, burger, bus, business, button, cafeteria, cage, cake, calligraphy, camera, campaign, Canada, cancer |
| 名詞（Ca-Ch）【11】 candy, cap, capital, captain, car, card, care, carpenter, carrot, carton, cartoon, case, cat, cattle, cause, cave, CD, ceiling, cell, cent, center, centimeter, century, cereal, chain, chair, championship, chance, character, charity, chart, chemical, cherry |
| 名詞（Ch-Co）【12】 chicken, child, children, China, Chinese, chopsticks, chorus, Christmas, church, city, class, classmate, classroom, clerk, clock, cloth, clothes, cloud, club, coffee, collection, college, color, comic, communication, company, computer, concert, conclusion, condominium, conductor, conference, connection |
| 名詞（Co-De）【13】 convenience, conversation, cook, cooperation, corner, costume, country, countryside, couple, courage, course, cousin, cow, crane, creativity, creature, crop, cuisine, culture, cup, curry, curtain, custom, cut, dance, dancer, danger, date, daughter, day, deadline, death, decision |
| 名詞（De-Do）【14】 deer, degree, democracy, demonstration, dentist, desert, desk, despair, detective, developing country, diary, dictionary, difference, difficulty, dignity, dinner, dinosaur, director, disaster, discussion, disease, display, distance, diver, doctor, dog, doll, dollar, dolphin, dome, door, doorbell, dot |
| 名詞（Dr-Ev）【15】 drama, dream, dress, driver, drum, e-mail, e-pal, ear, earth, earthquake, east, echo, egg, Egypt, electricity, elephant, emergency, end, endangered animals, energy, engine, engineer, England, entrance, envelope, environment, episode, equality, era, eraser, Europe, evacuation, evening |
| 名詞（Ex-Fi）【16】 examination, example, exchange, exhibition, exit, experience, expression, eye, eyesight, face, facility, fact, factory, fall, family, farewell, farm, farmer, fate, father, fault, favor, feeling, feet, fellow, fence, festival, fever, fiction, field, fine arts, finger, fire, firework |
| 名詞（Fi-Ge）【17】 fish, fitting room, flag, flame, flight, floor, flower, flute, folk, food, football, foreigner, forest, fossil fuel, fountain, fox, frame, France, French fries, fridge, friend, friendship, frog, front, fruit, fun, future, game, garbage, garden, gas, gate, gentleman |
| 名詞（Ge-Ha）【18】 German, Germany, gesture, gift, girl, glass, global warming, goal, God, gold, goodness, goose, gorilla, government, grade, grandchild, grandfather, grandmother, grass, grassland, green, greenhouse gases, greeting, ground, group, guest, guide, guitar, gull, habit, habitat, hair, Halloween |
| 名詞（Ha-Ho）【19】 hamburger, hand, handkerchief, handle, harm, harvest, hat, hay fever, head, headache, health, heart, heat, heritage, hero, highland, hill, hint, history, hobby, hole, holiday, home, home economics, homepage, homestay, homework, honey, honor, horizon, horse, hospital, host |
| 名詞（Ho-Ju）【20】 hotel, hour, house, humor, hunger, husband, idea, impact, importance, impossible, impression, India, Indian, influence, information, ink, insect, inspiration, instrument, interest, internet, interview, island, jam, Japan, Japanese, jellyfish, job, journey, joy, juice, jungle, justice |
| 名詞（Ke-Li）【21】 key, kilometer, kind, kindness, king, kingdom, kitchen, kite, knee, knife, knowledge, koala, Korea, lady, lake, land, landmine, language, lavatory, law, lawyer, leader, leaf, leaves, left, leg, lesson, letter, library, life, lives, light, line |
| 名詞（Li-Me）【22】 lion, liquid, locker, London, loss, lot, lullaby, lunch, machine, magic, man, men, manner, mansion, map, market, mask, master, match, mathematics, math, matter, meal, meaning, measure, meat, medal, medicine, meeting, member, memorial, memory |
| 名詞（Me-Mt）【23】 mess, message, meter, Mexico, midnight, mile, milk, minister, minute, mirror, Miss, mistake, model, mom, moment, money, monkey, monster, monument, moon, moral education, morning, mother, motto, mountain, mouse, mouth, movement, movie, Mr., Mrs., Ms., Mt. |
| 名詞（Mu-Nu）【24】 museum, music, musical, musician, nail, name, nap, nation, nature, neck, needle, neighbor, neighborhood, nephew, nest, net, New York, New Zealand, news, newspaper, nickname, niece, night, Nobel Peace Prize, noise, noon, north, northeast, nose, notebook, notice, number, nun |
| 名詞（Nu-Pa）【25】 nurse, obstacle, occupation, ocean, octopus, office, officer, oil, opera, operator, opinion, orange, orchestra, order, organ, outside, oxygen, ozone, page, pain, paint, painter, painting, pair, paper, pardon, parent, park, parking, part, partner, party, passport |
| 名詞（Pe-Pl）【26】 PE, peace, peel, pen, pencil, people, period, permission, person, pet, pharmacist, phone, photo, photographer, phrase, piano, picnic, picture, piece, pig, pillar, pilot, pink, pity, place, plan, plane, planet, plant, plastic, plate, player, playground |
| 名詞（Pl-Qu）【27】 pleasure, pocket, poem, poet, point, poison, police, pollution, pool, population, post, poster, pot, potato, power, present, presentation, pressure, price, priest, principal, priority, problem, program, project, promise, pumpkin, purple, purpose, pyramid, queen, question, quiz |
| 名詞（Ra-Ri）【28】 rabbit, race, racket, radio, rain, rainbow, rainforest, ramp, rat, ray, reason, recess, recipe, rectangle, recycling, refugee, relationship, relay, report, reporter, reproach, research, resource, rest, restaurant, restroom, rhythm, rice, rice cake, rider, right, ring, risk |
| 名詞（Ri-Sh）【29】 river, road, rock, rocket, roof, room, rose, rule, ruler, sadness, safety, sale, salesclerk, salmon, salt, sanctuary, sand, scene, school, science, scientist, scissors, sculpture, sea, season, seat, secondhand store, secret, section, seed, sentence, service, shade |
| 名詞（Sh-So）【30】 shape, sheep, sheet, shelf, ship, shirt, shoes, shop, shopping, shot, shoulder, shrine, side, sightseeing, sign, silver, singer, sister, site, situation, size, skill, skin, sky, slave, slum, smoke, snow, soccer, socks, social studies, softball, soldier |
| 名詞（So-St）【31】 solution, son, song, sound, soup, south, souvenir, space, spaceship, Spain, speaker, specialist, speech, spoon, sport, spring, square, stadium, stairs, stamp, stapler, star, starvation, station, statue, stay, step, stick, stomach, stomachache, stone, store, storm |
| 名詞（St-Te）【32】 story, stranger, street, string, struggle, student, style, subject, suburb, subway, success, summer, sun, sunrise, sunset, surface, survey, sweater, sword, symbol, system, T-shirt, table, tag, tail, task, tea, teacher, teacup, team, tear, telephone, telescope |
| 名詞（Te-To）【33】 television, temper, temperature, temple, tennis, test, textbook, Thanksgiving Day, theater, theme, thief, thing, thought, ticket, tiger, time, tissue, toast, today, toe, toilet, tomato, tomorrow, ton, tongue, tonight, tooth, teeth, toothache, top, tower, town, toy |
| 名詞（Tr-Un）【34】 track, track and field, trade, tradition, traffic, tragedy, train, trap, trash, travel, tray, treasure, tree, triangle, trick, trip, trouble, truck, trust, truth, tube, turkey, turn, turtle, TV, U.K., umbrella, United Nations, uncle, unicycle, uniform, United States, unity |
| 名詞（Un-We）【35】 universal design, university, use, vacation, value, variety, vegetable, vending machine, vet, victim, video, video game, view, village, violin, visit, visitor, voice, volcano, volleyball, volume, volunteer, vulture, waitress, wall, wallet, war, water, waterfall, way, weapon, weather, weather forecast |
| 名詞（We-Zo）【36】 web, week, weekend, well, west, whale, wheel, wheelchair, wife, wind, windmill, window, wine, wing, winner, winter, wish, witch, wolf, woman, wood, word, work, worker, world, World Heritage Site, yacht, year, yellow, yen, yesterday, zebra, zoo |
| 形容詞（順序を表す言葉）【37】 first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, eleventh, twelfth, thirteenth, fourteenth, fifteenth, sixteenth, seventeenth, eighteenth, nineteenth, twentieth, thirtieth, fortieth, fiftieth, sixtieth, seventieth, eightieth, ninetieth, hundredth, thousandth, millionth |
| 形容詞（Ab-Ce）【38】 able, active, adult, afraid, all, American, ancient, angry, another, any, artificial, asleep, atomic, awesome, bad, ill, worse, worst, bare, basic, beautiful, big, black, blind, blue, bored, boring, born, both, breathtaking, bright, British, brown, busy, careful, centigrade, certain |
| 形容詞（Ch-Dr）【39】 cheap, cheerful, chemical, Chinese, civil, clean, clever, close, cloudy, cold, colorful, comfortable, commercial, common, compulsory, conceited, confused, convenient, cool, correct, creative, crowded, cute, daily, dangerous, dark, dead, deaf, dear, deep, delicious, depressed, different, difficult, dirty, disabled, disappointed, dry |
| 形容詞（Dy-Fr）【40】 dying, each, easy, economic, efficient, elderly, elegant, elementary, else, embarrassed, empty, equal, even, every, exact, excited, exciting, expensive, fair, faithful, famous, far, fast, favorite, few, fine, fit, fond, foolish, foreign, former, foster, free, fresh, friendly, frightened, frustrated |
| 形容詞（Fu-La）【41】 full, funny, German, glad, global, good, well, better, best, great, greedy, half, happy, hard, healthy, heavy, high, honest, hot, huge, human, hungry, important, impossible, Indian, industrial, injured, integrated, intense, interested, interesting, international, itchy, Japanese, junior, kind, large |
| 形容詞（La-No）【42】 last, late, light, little, less, least, living, long, loud, lucky, major, many, much, more, most, master, meaningful, medium, memorial, mighty, military, minor, miserable, modern, musical, narrow, national, natural, naughty, necessary, neither, nervous, new, next, nice, noble |
| 形容詞（No-Re）【43】 noisy, northeast, northern, nuclear, official, old, only, open, opposite, optimistic, ordinary, original, other, outside, own, pale, paralyzed, particular, peaceful, perfect, plastic, pleasant, polite, political, poor, popular, positive, possible, present, pretty, proud, public, quiet, rainy, ready, real, red |
| 形容詞（Re-St）【44】 regular, relaxed, responsible, rich, ridiculous, right, round, sacred, sad, safe, same, scary, selfish, senior, serious, several, short, shy, sick, silent, silly, similar, simple, sleepy, slow, small, smart, smooth, snowy, sociable, soft, some, sore, sorry, sour, special, stiff, straight |
| 形容詞（St-Yo）【45】 strange, strong, stupid, such, sunny, sure, sweet, tall, terrible, thirsty, tired, tourist, traditional, true, unbelievable, unclean, underground, unequal, unhappy, useful, usual, vast, virtual, warm, weak, welcome, western, white, whole, wide, wild, willing, windy, wonderful, worth, wrong, young |
| 動詞（Ac-Br）【46】 act, add, admire, advertise, agree, allow, amaze, answer, appear, arrest, arrive, ask, assist, attack, bark, bear, become, became, begin, began, begun, believe, belong, blame, blow, blew, boil, border, borrow, bother, break, broke, broken |
| 動詞（Br-Co）【47】 bring, brought, broaden, brush, build, built, bump, burn, bury, buy, bought, call, campaign, care, carry, catch, caught, cause, celebrate, change, chew, choose, chose, clean, climb, close, collect, come, came, communicate, compare, complain, contact |
| 動詞（Co-Ea）【48】 continue, control, cook, cost, cough, count, cover, create, cross, cry, decide, decorate, decrease, develop, die, disagree, disappear, discover, displace, display, do, does, did, done, draw, drew, dream, drink, drank, drunk, drive, drop, dump, earn |
| 動詞（Ea-Fu）【49】 eat, ate, eaten, elect, enjoy, enter, excuse, expect, explain, explode, export, fail, fall, fell, fascinate, fasten, feel, felt, fight, fought, fill, find, found, finish, float, fly, flew, fold, follow, forget, forgot, forgive, fulfill |
| 動詞（Ga-Hu）【50】 gather, get, got, give, gave, given, go, went, gone, graduate, grow, grew, guess, guide, handle, hang, happen, harm, hate, have, has, had, heal, hear, heard, help, hide, hit, hold, held, hope, hurry, hurt |
| 動詞（Im-Le）【51】 imagine, increase, injure, inspire, insult, interest, introduce, invent, investigate, invite, join, judge, jump, keep, kill, knit, knock, know, knew, known, land, last, laugh, launch, lay, laid, lead, led, learn, leave, lend, lent |
| 動詞（Li-Pa）【52】 lie, lay, lain, lied, lift, like, listen, live, locate, look, lose, make, made, marry, master, mean, meant, meet, met, mind, miss, move, need, nod, offer, open, order, overcome, paint, park, participate, pass, pay, peel |
| 動詞（Pi-Re）【53】 pick, plan, plant, play, please, poison, pollute, post, practice, prefer, prepare, present, print, produce, protect, provide, publish, pull, punish, push, put, rain, raise, reach, react, read, realize, rebuild, receive, recognize, recycle, reduce, refresh |
| 動詞（Re-So）【54】 reject, relay, release, remain, remember, remind, remove, report, represent, reproach, rescue, research, respect, respond, return, reuse, ride, rode, ridden, rise, run, ran, run, save, say, said, scare, scold, search, see, saw, seen, seem, sell, sold |
| 動詞（Se-St）【55】 send, sent, separate, sew, shake, sheet, shine, shoot, shop, shout, show, shut, sing, sang, sung, sit, sat, ski, sleep, smell, smile, smoke, snow, solve, sort, sound, speak, spoke, spoken, spell, spend, stand, start, starve, stay |
| 動詞（St-Tr）【56】 sting, stop, strive, struggle, study, succeed, suffer, support, suppose, surf, surprise, surround, survive, swallow, swim, swam, swum, take, took, taken, talk, teach, taught, tease, tell, told, thank, think, throw, threw, thrown, touch, travel, treat |
| 動詞（Tr-Ya）【57】 trust, try, turn, uncover, understand, understood, use, visit, wait, wake, woke, woken, walk, want, wash, waste, watch, weaken, wear, weigh, whisper, whistle, win, won, wish, wonder, work, worry, wrap, wrestle, write, wrote, written, yacht |
| 副詞（A.-Fi）【58】 a.m., about, abroad, again, ago, almost, alone, aloud, already, also, always, anytime, anywhere, away, back, best, better, carefully, certainly, cheerfully, clearly, closely, definitely, downstairs, early, easily, either, else, enough, especially, even, ever, everywhere, fast, finally |
| 副詞（Fl-Ra）【59】 fluently, forever, forward, happily, here, incredibly, instead, just, later, long, maybe, more, most, never, no, northeast, not, now, o’clock, off, often, OK, once, out, outside, over, p.m., perhaps, please, precisely, quickly, quietly, quite, rather |
| 副詞（Re-Ye）【60】 ready, really, right, round, sadly, sincerely, slowly, so, someday, somehow, sometimes, soon, still, straight, strongly, suddenly, sure, then, there, tightly, together, tomorrow, tonight, too, truly, unfairly, up, usually, very, well, worst, yes, yesterday, yet |