动词(非谓语动词)非谓语不定式( to do)分词动名词( -ing)过去分词 (-ed)现在分词 (-ing)- ing 分词-ed 分词 动词不定式1 不定式做主语2 不定式做表语3 不定式做宾语4 不定式做宾语补足语5 不定式做定语6 不定式做状语7 不定式用法注意事项 1) 不定式做主语时,一般用 it 当形式主语,把作主语的不定式短语后置
It took me only five minutes to finish the job
完成那个任务花去了我五分钟
It took me two hours to write my homework
我花了两个小时用来写作业
2) 不定式做主语也可用在下列结构 There seems/used/happened to be + 主语There used to be a lemon tree at the back of the yard
院子后面以前有一棵柠檬树
• 不定式做作主语时,可以用 it 做形式主语,将不定式后移,而采用“ It is + 形容词 + 不定式”的结构brave careless clever considerate difficult easy foolish good hard helpful impolite important kind naughty necessary nice polite possible right rude silly stupid thoughtful wise wrong例如: It is very difficult for him to finish the paper in such a short time
在如此短的时间内完成试卷对他来说很难
例如: It is hard to say who will laugh in the en