顾俊萍
与形容词相关的句型是本单元语法重点和难点。现将其相关句型全面介绍给同学们。
No.1It's+形容词+that从句
[要点小结]在该句型中,让是形式主语,that从句才是真正的主语。that从句通常位于句子的末尾。适用于该句型的形容词有:wrong,important,necessary,true,funny,clear,lucky,sad等。
[金牌例句]Its strange that they set the thief free last night
很惊讶,他们昨晚竟将那个小偷放了。
Itstrue that Class Three won the football match last week.
三班上周真的赢了那场足球赛。
No.2It's+形容词+动词不定式
[要点小结]在该句型中,it也是形式主语,真正的主语应是动词不定式。当然,动词不定式也可以直接位于句首来担任句子的主语,但在现代英语中,这种结构用得不多。
[金牌例句]Its important to learn English well now.
如今,学好英语很重要。
[相关链接]该句型也适用于动词take(花费)。例如:
It tkesus about twenty minutes to read English every morning.
每天早晨读英语大约花费我们二十分钟。(动词不定式是该句的真正主语,it只是形式主语)
No.3It's+形容词+for sb./sth.+动词不定式
[要点小结]通常情况下,用作主语的动词不定式结构的逻辑主语通常可以在特定的上下文语境中看出。但在该结构中,动词不定式的逻辑主语就是for后面的人或物。for sb./sth.to do sth.常被称作动词不定式复合结构。一般说来,be后面接表示事物性质的形容词(如easy,difficult,important等)时,常用介词for;此时,形容词是针对不定式的。
[金牌例句]Its necessary for us to keep healthy.
保持健康对我们是很有必要的。
Its important for you to learn team spirit.
学习团队精神对你们是非常重要的。
[相关链接]如果be后面接指人的性情或特征的形容词(如clever,kind,foolish等),并且是针对动词不定式的逻辑主语的,要用介词of。例如:
Itsvery kind of you to help me.你帮助我真是太友好了。
[友情提醒]of和for都是介词,如后接代词作宾语,要用代词宾格。试体会:
我们在足球赛前或比赛时互相支持互相帮助是很有必要的。
[误] It's necessary for we to support and help each other both before andduring the football match.
[正] It's necessary for us to support and help each other both before andduring the football match.
1. It's necessary that you train yourself before the match. (同义句)
It's necessary____you____ ____yourself before the match.
2. It's important and helpful____
A. kindB. tokindC. bekindD. tobekind
3. It's not difficult for us____Chinese well.
A. to learnB. learningC. learnedD. learn
4. It's better____on rainy days.
A. stay at homeB. to stay at homeC. staying at homeD. stays at home
5. Is it impossible____him____the problem?
A. of; solveB. for; solveC. of; to solveD. for; to solve
Keys: 1. for ; to train2. D 3. A4. B5. D
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