It 句型归纳(2页).doc

-It 句型归纳-第 2 页It 句型归纳：1Itiswas形容词（forof sb）动词不定式短语。对于这个句型中究竟用 for还是用of，一般遵循这样的规则：如果形容词仅仅是描述事物的形容词，如：difficult， easy，hard，important，dangerous等用for；如果形容词是描述不定式行为者的性格、品质的，如：kind，good，nice，clever等则用of。如： It is interesting to play with snow in winter冬季里玩雪是很有趣的。 It's important for us to keep the water clean保持水质清洁对我们来说是很重要的。 It's very kind of you to say so你这样说真是太好了。 注意：这一句式中的形容词位置也可换用名词；连系动词be也可换用其它连系动词，如feel等。如： It's a good habit to get up early and go to bed early早睡早起是好习惯。 It must be great fun to fly to the moon in a spaceship乘宇宙飞船飞往月球一定很有趣。 It feels strange to have a twin sister有个孪生姐妹感觉很奇怪。2. Itiswas形容词从句。如： It is certain that he will come他一定会来。 It's true that he may fall behind the other students他真的可能落后于其他同学。 It is strange that he should say so他居然这么说，真是奇怪。3. It is was one's turn（duty，pleasure） to do sth意为“该轮到某人做某事（做某事是某人的责任、愉悦的事）”。如： It's your turn to be on duty tomorrow明天轮到你值日了。4. It takes（sb）some time to do sth意为“（某人）花时间做某事”。如： It took me a week to finish reading the book我花了一周时间看完这本书。 5It costcosts sbsome money to do sth译为“某人花多少钱做某事”。如： It cost me 260 yuan to buy the new watch我买这块新手表花了260元。 6It seems seemed 从句。译为“看起来好像”，此结构可以转换成“seem 动词不定式”形式。如： It seems that he is illHe seems to be ill看起来他好像病了。7. 主语谓语it宾语补足语动词不定式动名词从句。该句型中宾语补足语可由形容词、名词等充当。如： He found it not easy to learn a foreign language well他发现学好一门外语是不容易的。 We think it no good reading in bed我们认为躺在床上看书无益处。 I think it necessary that we have the meeting我认为开这个会是必要的。