选词填空
①It has been calculated that the trip will take two days.
②The rescuers are looking for the survivors with_the_help_of dogs.
③Please be more careful from_now_on.
④Soldiers arrived to watch_over the city and maintain peace.
1.I think it's_impossible_to_live without computers!
我认为离开了计算机就没法生活!
【句型透视】(1)句中it为形式主语,动词不定式短语是真正的主语,其基本结构为“It be+ adj./n.+(for/of sb.) to do sth.”。
It is bad manners to leave your food on the plate in some countries.
在一些国家,把你的食物剩在盘子里是不礼貌的。
(2)在上述结构中, for前面通常是difficult, necessary, important等多与事物特征有关的形容词;而of前面通常是wise, kind, stupid, nice等与人的性格特点有关的形容词。
It is hard for you to finish the job in three days.
三天内让你完成这项工作有点困难。
It is kind of you to help me with the case.
你帮我搬箱子,真是太好了。
【对点练习】
Ⅰ.介词填空
①It was very kind of you to come to help me.
②It is difficult for a foreigner to learn Chinese.
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