本文目录
在英语中,不定式是一种非谓语动词,表示一种动作或状态,不具备时间和人称的特点。不定式有三种形式:带to的不定式、省略to的不定式以及完成时不定式。
带to的不定式
带to的不定式通常作为动词的宾语、主语、表语、定语等,如:
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I want to study abroad. (to study作want的宾语)
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To learn English well is important. (to learn作主语)
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Her dream is to become a doctor. (to become作表语)
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There are many books to read. (to read作定语)
省略to的不定式
有些动词后可以省略to,这些动词一般是感官动词、使役动词、助动词和看起来、听起来、感觉等。
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I saw him leave the room. (leave省略了to)
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She made me cry. (cry省略了to)
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He can play the guitar. (play省略了to)
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The cake smells delicious. (smells省略了to)
完成时不定式
完成时不定式表示在过去某个时间或动作之前已经完成了的动作,形式为have + 过去分词。它通常作为动词的宾语、主语、表语等。
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I am happy to have finished my homework. (to have finished作happy的表语)
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She wants to have seen the movie. (to have seen作wants的宾语)
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His dream is to have traveled around the world. (to have traveled作dream的表语)
总的来说,不定式在英语中有着广泛而重要的用途,掌握不定式的用法对于提高英语水平有着很大的帮助。