Page 32 - 高中英语小题狂做·选择性必修第四册·RJ
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10 高中英语小题狂做·选择性必修第四册·RJ
To complete the 30-storey building in one year was quite a difficult task.
To do that implies taking responsibility.
To be invited to the party is a great honour.
当主语较长,谓语较短时,常用 it 作形式主语,而将动词不定式置于谓语的后面。
It is important for modern young people to master at least two foreign languages.
常用于以下句型:
①it+be+adj. ( +of / for sb) +to do sth(当形容词表达事物的特征时,其后用 for sb;当形容词表达人的特征或品质时,其
后用 of sb)
It is important for us young people to learn English and master it.
It is generous of him to contribute so much.
②it is+名词(a pleasure, a pity, a pleasant thing, one s duty, an honour, a shame ) +to do sth
It is a pity to have to go without her.
③it takes (sb) some time (hours, months, days, a lot of time, patience ) +to do sth
It takes me three hours to learn English each day.
2. 动词不定式作表语
动词不定式作表语时位于系动词的后面,表示具体的动作或将来的动作。 这些系动词主要是 be 动词(am、is、
are、was、were、been 等)和表象系动词(seem、appear 等)。
(1) 动词不定式的各种形式均可作表语,有不同的时态意义。
He seems to know everything.
He seems to be watching TV.
He seems to have gone abroad.
(2) 当主语是表示愿望、计划、目的和梦想等含义的名词时,要用动词不定式作表语。
My wish is to be a college student.
The purpose of the organization is to greet all newcomers to the city and to provide them with any necessary information.
(3) 动词不定式作表语时,可以用来解释主语的内容。
My job is to sweep the floor.
3. 动词不定式作宾语
(1) 动词不定式可以充当部分及物动词(短语)的宾语,这时取决于动词的用法。
He agreed to go there with me after school.
I can t afford to buy a car.
注意:在有些动词后,既可以用动词不定式作宾语,也可以用动名词形式作宾语,但意义往往不一样:
① forget / remember to do sth 忘了/ 记得去做某事
forget / remember doing sth 忘了/ 记得做过某事
② regret to do sth 遗憾地要去做某事
regret doing sth 后悔做过/ 做了某事
③ try to do sth 尽力做某事
try doing sth 尝试做某事
④ mean to do 打算做
mean doing 意味着
⑤ stop to do sth 停下来去做某事
stop doing sth 停止做某事
⑥ go on to do 接着做不同的事情
go on doing 继续做同样的事情
