句子(句子分類,句型轉(zhuǎn)換）
句子的分類:由句子結(jié)構(gòu)來講,可分為三類簡單
一、簡單句：由一個主語(或并列主語)和一個謂語（或并列謂語）構(gòu)成的句子.
eg. We cleaned the windows and tidied the room.

二、并列句：由并列連詞and, but,so,or,for等把兩個或兩個以上的簡單句連起來的句子.
eg. 1)I come from China and he comes from Japan.
2)Hurry up,or you'll miss the train.
3)He looked for it everywhere, but he couldn't find it.
4)She didn't know the answer to the question,so she asked the teacher.
5)He's interested in music while John is interested in sports.

三、復(fù)合句
A.賓語從句：賓語從句在復(fù)合句中作主句的賓語,引導(dǎo)賓語從句的關(guān)聯(lián)詞有that, if/whether, what, who, whose, which, why, when, where, how等.

1、連接詞
1)由連接詞that引導(dǎo)陳述句,在口語中that常省略.
eg. He said that he would like to see the headmaster.

2)由連接詞whether/if引導(dǎo)一般疑問句,whether和if ?？苫Q,但下列場合一般用whether.
①介詞后的賓語從句：I'm thinking of whether he'll come.
②與or not連用：I don't know whether I should go or not.
3)由連接代詞what,who(whom,whose)which或連接副詞when,where,why,how引導(dǎo)特殊疑問句. eg. Do you know who/whom she is waiting for?

2、語序：不管賓語從句是陳述句、一般疑問句或特殊疑問句,都要用陳述句語序,也就是說主謂次序不能顛倒.連接詞＋主謂結(jié)構(gòu)
(1).Bill wanted to know who did this.
(2).I don't know what's the matter with Bob?
(3).I don't know what's wrong with them?

3、時(shí)態(tài)：一般說來,主從句時(shí)態(tài)要統(tǒng)一.如果主句是一般現(xiàn)在時(shí),從句可根據(jù)需要用其它任何時(shí)態(tài)；如果主句是一般過去時(shí),從句應(yīng)該用相應(yīng)的過去時(shí)態(tài)范疇（也就是用一般過去時(shí),過去進(jìn)行時(shí),過去將來時(shí),過去完成時(shí)）.
eg.①Lily wanted to know whether her grandma liked the handbag.
②I asked the teacher where we would have the meeting.
③Could you tell me how I can get to the zoo?

如果從句表明的是一個客觀事實(shí)或真理,那么無論主句是什么時(shí)態(tài),從句都只能用一般現(xiàn)在時(shí). eg. The teacher told us that light travels much faster than sound.

注意：在think后的賓語從句,如果需要表示否定意義,一般不在賓語從句中否定,而是在主句中否定.
eg. I don’t think that English is easy.
I think that English is not easy. ( 誤)