高一英語(yǔ)必修3 Unit 4教案
② 常見(jiàn)用it作形式主語(yǔ)的復(fù)合句結(jié)構(gòu)
◆ it is a fact （a good idea / a pity / a shame / no wonder / good news…）that…如：
it’s a pity that you missed the film.
你沒(méi)有看那部電影真是太遺憾了。
◆ it is necessary （clear / true / strange/ important /wonderful / possible / likely…）that…
需要注意的是，這類(lèi)主語(yǔ)從句中，謂語(yǔ)動(dòng)詞很多為“（should）＋動(dòng)詞原形”，即要用虛擬語(yǔ)氣。如：
it is necessary that you （should）master the computer.
你很有必要掌握電腦。
it is important that a student learn english well.
學(xué)生學(xué)好英語(yǔ)很重要。
it’s clear that they badly need help.
很明顯，他們急需援助。
it is likely that a hurricane will arrive soon.
颶風(fēng)很可能馬上就要到達(dá)了。
◆ it is reported （well-known / hoped / thought / expected /said /believed/decided /suggested /order-ed…）that…如：
it is said that he was killed in the earthquake. 據(jù)說(shuō)他在地震中喪生了。
◆ it seems （happened / appears / doesn’t matter / makes no difference / …）that …如：
it seems that they will win the game.
看起來(lái)他們好像會(huì)贏得這場(chǎng)比賽。
it makes no difference whether he will attend the meeting or not.
他是否會(huì)參加會(huì)議都無(wú)關(guān)緊要
(4) 主語(yǔ)從句不可位于句首的五種情況：
① if 引導(dǎo)的主語(yǔ)從句不可居于復(fù)合句句首。
② it is said /reported…結(jié)構(gòu)中的主語(yǔ)從句不可提前。例如：
it is said that president jiang will visit our school next week. √
that president jiang will visit our school next week is said. ×
③ it happens/occurs…結(jié)構(gòu)中的主語(yǔ)從句不可提前。例如：
it occurred to him that he failed in the examination. √
that he failed in the examination occurred to him. ×
④ it doesn’t matter how/whether …結(jié)構(gòu)中的主語(yǔ)從句不可提前。例如：
it doesn’t matter whether he is wrong or not. √
whether he is wrong or not doesn’t matter. ×
⑤ 含主語(yǔ)從句的復(fù)合句是疑問(wèn)句時(shí)，主語(yǔ)從句不可提前。例如：
is it likely that it will rain in the evening? √
is that will rain in the evening likely? ×
3. practice
purpose: to get the students to have the knowledge of the grammar through exercise.