作业帮英语什么情况下用不定式
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英语什么情况下用不定式
英语什么情况下用不定式
英语什么情况下用不定式
英语有好多情况都要用到不定式,首先在一些固定结构中,比如asksomebody to do something ,tell sb to do sth 等中；另外不定式可以用来做句子的主语,表语等,如To say something is easy.(主语）My task is to finish this job.（表语）不定式的用途比较广泛,应该在具体的语言实践中总结归纳从而达到灵活掌握的目的.
http://baike.baidu.com/view/26732.html?wtp=tt#8_2 看一下吧，主要看那个不定式的语法功能]
1.用在一些及物动词后，如 want to do fail to do decide to do manage to do plan to do \4\32。用在一些疑问词后可做主语，宾语，表语等。When to start is not decided.\4\33 用在介词but后做介词宾语，如 I did nothing but watch ...
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1.用在一些及物动词后，如 want to do fail to do decide to do manage to do plan to do \4\32。用在一些疑问词后可做主语，宾语，表语等。When to start is not decided.\4\33 用在介词but后做介词宾语，如 I did nothing but watch TV yesterday./ We had no choice but to wait here.\4\34。用在动词后也可在句首做状语。如 He came to see me./ To/In order to catch the early bus ,he got up early.\4\35。用在系动词后做表语。如My dream is to be a scientist.\4\36. 用在句首做主语, To be a singer is my dream.\4\37.用在名词或代词后做后置定语， The best time to come to Beijing is autume.\4\38.用在宾语后补充宾语做了什么，叫宾语补语\4\3 Our teacher tells us to read more in the morning .]
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动词不定式形式，是用来表达想做，但尚未去做的事。 如： My plan is to write 3 books in a year. 我的计划是要在一年里写出三本书。（想写，还没写） He decided to help his father on the farm. 他决定在农场帮助他父亲。（想帮，尚未去做） To make a plan for such a great pr...
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动词不定式形式，是用来表达想做，但尚未去做的事。 如： My plan is to write 3 books in a year. 我的计划是要在一年里写出三本书。（想写，还没写） He decided to help his father on the farm. 他决定在农场帮助他父亲。（想帮，尚未去做） To make a plan for such a great project is not an easy thing. 要为这么大个项目做计划，不是件容易的事。（想做计划，但尚未实施）]
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