動詞不定式可以在句子中用作狀語,有下列幾種情況:
[A] 放在不及物動詞(come,go,stop,finish,wait等詞)的后面。如:He came to see her yesterday.(他昨天來看望她)(表示來的目的)/ I stopped to have a rest.(我停下來休息一會兒)(表示停下來的目的)
[B] 放在完整的謂語之后(即“謂語+賓語”、“謂語+賓語+補語”、“動詞+表語”之后)。如:We cleaned the room to let him play in it.(我們打掃了房間以便讓他在里面玩)/ I opened the window to see more clearly.(我打開窗子以便看得更清楚點兒)
[C] 有時表示目的的不定式短語可以放在句首。如:To arrive there on time,I got up one hour earlier than usual.(為了按時到達,我們比平時早起了一個小時)(表示早起的目的)
[注意] stop to do 與stop doing的不同。如:They stopped to have a look.(他們停下來看看)(不定式作“停下來”的目的狀語)/ They stopped looking out of the window and began to listen to the teahcher.(他們停止向窗外望,開始聽老師講課)(動名詞作賓語,表示“停止”的內容)
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