Unit 1 The world of our sense教案
③復(fù)合句--------一個主句+從句（一個或以上）構(gòu)成。
根據(jù)從句在復(fù)合句中的作用，分為名詞性從句、定語從句和狀語從句。
名詞性從句包括主語從句、表語從句、賓語從句、同位語從句。
1. 主語從句-----在句中作主語，可用it作形式主語
e.g. what you said sounds reasonable.
it is well known/reported/thought/said/… that…
it is natural/surprising/necessary/certain/true/clear… that…
it is a pity/a shame/an honour/no surprise/no wonder… that…
it doesn’t matter whether…
it seems\appears that… it happens that…碰巧
2.表語從句-----位于系動詞之后,表語從句還可用as if/as though/because/why引導(dǎo)
e.g. the question is who can complete the difficult task.
3.同位語從句-----跟在名詞后面，進一步說明該名詞的具體內(nèi)容。名詞主要有：fact, news（word）, promise, idea, truth, thought, suggestion, hope, proposal, doubt等。一般用that引導(dǎo)，不省略，不用which..也可用whether (不用if), who, what, which, when, where, how , why
e.g. the news that our team has won the match is true.
4.賓語從句
1） 作及物動詞或介詞的賓語（it可作形式賓語；注意whether和if區(qū)別）
2)直接引語和間接引語
i doubt whether\if he will keep his word. i don’t doubt that our team will win.
一.引導(dǎo)詞
1.從屬連詞有that, whether, if。它們只起連接作用，不充當(dāng)從句的任何成分
2.連接代詞有who, whom, whose, what, which, whatever, whoever, whichever等。它們在從句中起連接作用，本身又作從句的主語、賓語、賓補或定語。
3.連接副詞有when, where, why, how 等，它們既起連接作用，本身又作從句的狀語。
how many(much, far, long, often,soon)等引導(dǎo)主語、賓語、表語從句
二.語序： 名詞性從句中一律用陳述句語序
when he will arrive is not known.
i don't know how i can get through the exam.
三.時態(tài)
1.在賓語從句中，當(dāng)主句是一般現(xiàn)在時，其從句的謂語根據(jù)各種需要用各種時態(tài)
mary is very diligent. mary was very diligent.
mary is reading english. tom said mary was reading english.
tom says mary will give us a talk. mary would give us a talk.