不定詞意思
不定詞(Infinitive)是英語中的一種動詞形式,用來表示目的、結果、假設、未來的動作,或者用來修飾名詞、形容詞或另一個動詞。不定詞由「to」加上動詞原形構成,例如 "to go", "to eat", "to be"。以下是一些不定詞的例子和用法:
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表示目的:
- I want to learn English. (我想要學英文。)
- She decided to stay at home. (她決定待在家裡。)
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表示結果:
- He tried to open the door, but it was locked. (他試圖打開門,但它鎖上了。)
- The meeting was cancelled due to the bad weather. (由於惡劣的天氣,會議被取消了。)
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表示假設:
- If you want to succeed, you must work hard. (如果你想要成功,你必須努力工作。)
- I wish to speak to the manager. (我希望和經理談談。)
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修飾名詞:
- It's a good habit to brush your teeth twice a day. (一天刷兩次牙是一個好習慣。)
- The ability to learn quickly is important. (快速學習的能力很重要。)
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修飾形容詞:
- He is too young to understand this. (他太年輕了,無法理解這個。)
- The room is big enough to hold 50 people. (這個房間夠大,可以容納50人。)
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修飾另一個動詞:
- She promised to help me. (她答應幫助我。)
- We agreed to meet at 10 o'clock. (我們同意10點見面。)
不定詞有時可以帶有賓語或補語,構成不定詞短語,例如:
- He wants to buy a new car. (他想要買一台新車。)
- I need to find a new job. (我需要找一份新工作。)
不定詞還可以用來表達未來的動作,尤其是在特定的句子結構中,例如:
- She's planning to go on vacation next month. (她計劃下個月去度假。)
- I'm sorry to hear that. (聽到那個我很抱歉。)
不定詞的否定形式是在to之前加上not,例如:
- He didn't want to go. (他不想去。)
- I can't afford to buy a new house. (我負擔不起買新房子。)
不定詞的用法多樣,是英語學習者需要掌握的重要語法結構之一。