动词不定式常用句型：

(1) It takes / took / will take sb. some time / money to do sth. 　　某人花/花了/将花多长时间/多少钱做某事. 　　例句：It took me years of hard work to speak good English. 　　为了讲一口流利的英语,我花了多年时间刻苦操练.

(2) It is + adj +for/of sb to do sth 　　例：Lincoln said that it was not right for the South to break away from the 　　Union.林肯说南方脱离联邦是不对的。 　　It was careless of Tom to break the cup.

(3) Sb. have / has / had no choice but to do… 某人除了做……别无选择. 　　例句：We had no choice but to take a taxi for we’d missed the last bus. 　　由于错过了最后一班公共汽车,除了乘坐的士,我们别无选择.

(4) It’s not /just like sb. to do sth.……的行为不/正像某人的一贯作风. 　　例：lt’s not like Jim to be late for class. He regards time as the most 　　important thing in life. 　　上课迟到不像吉姆的一贯作风,他把时间看作是生命中最重要的.

(5) …形容词/副词+enough to do sth. 　　例：I was fortunate enough to travel to South Africa…

(6) It pays to + V — (…是值得的。) 　　例句：It pays to help others. 帮助别人是值得的。

(7) It cost sb some time/money to do sth 　　例：It must cost a good deal to live here.住这儿一定会花很多钱的。

(8) do all he could to do sth 　　do what he could to do sth 　　do everything he could to do sth 　　例：They were doing everything they could to help the fatherland. 　　他们在尽最大努力去帮助祖国。

(9) It is hard to imagine/ say …很难想象/说…… 　　例：It is hard to imagine how Edison managed to work twenty hours each 　　day.很难想象爱迪生每天是怎样工作20小时的。 　　It’s hard to say whether the plan is practical.这个计划是否实际很难说

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