【正文】 ：difficult，easy，hard，important，dangerous等用for；如果形容詞是描述不定式行為者的性格、品質的，如：kind，good，nice，clever等則用of。如：It is interesting to play with snow in winter． 冬季里玩雪是很有趣的。It39。s important for us to keep the water clean．保持水質清潔對我們來說是很重要的。It39。s very kind of you to say so．你這樣說真是太好了。注意：這一句式中的形容詞位置也可換用名詞；連系動詞be也可換用其它連系動詞，如feel等。如：It39。s a good habit to get up early and go to bed early．早睡早起是好習慣。It must be great fun to fly to the moon in a spaceship．乘宇宙飛船飛往月球一定很有趣。It feels strange to have a twin sister．有個孿生姐妹感覺很奇怪。2．It ＋will be／is ／was ＋形容詞＋動名詞短語。如： It39。s bad playing in the street．在街上玩是沒好處的。Is it any good trying again？再試一次有用嗎？ 3．It＋is／was＋形容詞＋從句。如：It is certain that he will e．他一定會來。It39。s true that he may fall behind the other students．他真的可能落后于其他同學。It is strange that he should say so．他居然這么說，真是奇怪。4．It ＋is ／was ＋one39。s turn（duty，pleasure）＋to do sth．意為“該輪到某人做某事（做某事是某人的責任、愉悅的事）”。如：It39。s your turn to be on duty tomorrow．明天輪到你值日了。5．It takes（sb．）some time to do sth．意為“（某人）花??時間做某事”。如 It took me a week to finish reading the book．我花了一周時間看完這本書。6．It ＋cost／costs ＋sb．＋some money ＋to do sth．譯為“某人花多少錢做某事”。如： It cost me 260 yuan to buy the new watch．我買這塊新手表花了260元。7．It seems ／seemed ＋從句。譯為“看起來好像??”，此結構可以轉換成“seem ＋動詞不定式”形式。如：It seems that he is ill．＝He seems to be ill．看起來他好像病了。[原題再現] ①________is a fact that English is being accepted as an international ② In fact________ is a hard job for the police to keep order in an important football 答案: ① D ② D五、用作形式賓語。當句子的真正賓語是動詞不定式、動名詞或從句時，為避免句子頭重腳輕，須將其放在賓語補足語之后，改用先行詞it占據其原來的位置。it用作形式賓語的句型為：主語＋謂語＋it＋賓語補足語＋動詞不定式／動名詞／從句。該句型中賓語補足語可由形容詞、名詞等充當。如：He found it not easy to learn a foreign language well．他發(fā)現學好一門外語是不容易的。We think it no good reading in bed．我們認為躺在床上看書無益處。I think it necessary that we have the meeting．我認為開這個會是必要的。[原題再現] Don39。t ________that all those who get good grades in the entrance examination will prove to be most as granted this for granted that for granted it for granted 答案: D。如：It was in the street that I saw Li Ping this ，就是在街上我看見李明。[原題再現] ________was in 1979________I graduated from 。that 。that 。when 。when 答案: B 。如：It seems as if we should finish it tomorrow.【練習】（1）There is a photo on the the photo of Lei 39。s （高考，1980)（2)Is＿necessary to tell his father everything? (MET1987)(3)Is＿possible to fly to the moon in a spaceship? (4)I consider____ my duty to help you． (5).It was at four o39。clock in the afternoon ____ he and his grandpa reached the museum in 答案：(1)C(2)A(3)D(4)A(5)B(6)．I like ____ in the autumn when the weather is clear and bright.（2004全國I） (7).Do you like ___ here?Oh， air，the weather，the way of is so nice.（2004全國II） (8)．The Parkers bought a new house but ____ will need a lot of work before they can move (9).I hate___ when people talk with their mouths (10).Joan had often heard____ said that Marley had no 答案：C D B A A八、it, one和that作替代詞的用法及區(qū)別it, one和that雖然都可以用來替代前面所提到的一個單數名詞,以避免重復,但在具體用法上卻有不同。簡述如下: ,該事物既可以是可數名詞也可以是不可數名詞。[原題再現] The news that they failed their driving test discouraged him, ______? they 39。t they it 39。t it 答案: D 。該事物只能是可數名詞,前面可以有冠詞,也可以被this、that或形容詞修飾,其后也可以有定語。[原題再現]Why don39。t we have a little break?Didn39。t we just have________? 答案: C 。該事物既可以是可數名詞也可以是不可數名詞,要有后置定語,但不可以有前置修飾語。[原題再現] Few pleasures can equal ________ of a cool drink on a hot 答案: C高考“it”的用法英語題歷屆高考英語單項選擇題精選（一）“it”的用法 it during the Second World War_____ he died? which(88) ____ necessary to plete the design before National Day? (89) dont think ____ possible to master a foreign language without much memory (91) ______ matter if he can’t finish the job on time? (91) was not _____ she took off her glasses _____ I realized she was a famous film , that , that , that , then(92) was disappointed with the had expected ______ to be much (93) was not until 1920 ______ regular radio broadcasts (94) a fact that English is being accepted as an international (95) was only when I reread this poems recently _____ I began to appreciate their (97) hate _____ when people talk with their mouths (98) is the ability to do the job _____ matters not where you e from or what you (2000)KEYS: 15 ACDDB 610 DCDBA 11 B’