顧俊萍
與形容詞相關的句型是本單元語法重點和難點?,F(xiàn)將其相關句型全面介紹給同學們。
No.1It's+形容詞+that從句
[要點小結(jié)]在該句型中,讓是形式主語,that從句才是真正的主語。that從句通常位于句子的末尾。適用于該句型的形容詞有:wrong,important,necessary,true,funny,clear,lucky,sad等。
[金牌例句]Its strange that they set the thief free last night
很驚訝,他們昨晚竟將那個小偷放了。
Itstrue that Class Three won the football match last week.
三班上周真的贏了那場足球賽。
No.2It's+形容詞+動詞不定式
[要點小結(jié)]在該句型中,it也是形式主語,真正的主語應是動詞不定式。當然,動詞不定式也可以直接位于句首來擔任句子的主語,但在現(xiàn)代英語中,這種結(jié)構(gòu)用得不多。
[金牌例句]Its important to learn English well now.
如今,學好英語很重要。
[相關鏈接]該句型也適用于動詞take(花費)。例如:
It tkesus about twenty minutes to read English every morning.
每天早晨讀英語大約花費我們二十分鐘。(動詞不定式是該句的真正主語,it只是形式主語)
No.3It's+形容詞+for sb./sth.+動詞不定式
[要點小結(jié)]通常情況下,用作主語的動詞不定式結(jié)構(gòu)的邏輯主語通??梢栽谔囟ǖ纳舷挛恼Z境中看出。但在該結(jié)構(gòu)中,動詞不定式的邏輯主語就是for后面的人或物。for sb./sth.to do sth.常被稱作動詞不定式復合結(jié)構(gòu)。一般說來,be后面接表示事物性質(zhì)的形容詞(如easy,difficult,important等)時,常用介詞for;此時,形容詞是針對不定式的。
[金牌例句]Its necessary for us to keep healthy.
保持健康對我們是很有必要的。
Its important for you to learn team spirit.
學習團隊精神對你們是非常重要的。
[相關鏈接]如果be后面接指人的性情或特征的形容詞(如clever,kind,foolish等),并且是針對動詞不定式的邏輯主語的,要用介詞of。例如:
Itsvery kind of you to help me.你幫助我真是太友好了。
[友情提醒]of和for都是介詞,如后接代詞作賓語,要用代詞賓格。試體會:
我們在足球賽前或比賽時互相支持互相幫助是很有必要的。
[誤] 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. (同義句)
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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