原因狀語從句Word版

1、傳播優(yōu)秀word版文檔 ，希望對您有幫助，可雙擊去除！二、原因狀語從句：1、定義：在句中用來說明主句原因的句子叫原因狀語從句。2、常用引導(dǎo)詞: because (因為), as (由于), since (既然), now (that) (既然) 3、時態(tài)：原因狀語從句一般都是根據(jù)實際情況選用適當(dāng)?shù)臅r態(tài)。通常是主過從過，主現(xiàn)從現(xiàn)。4、because, since和as的區(qū)別：1) because引導(dǎo)的原因狀語從句一般放于主句的后面，because從句位于句首時要用逗號分開，放在句末時，可不用逗號分開。because表示直接原因， 語氣最強， 最適合回答why引導(dǎo)的疑問句。because of 也

2、表示原因，但它后面不接從句, 只能接名詞, 代詞或動名詞。注意：because 和so 不可同時出現(xiàn)在一個句子里。 i do it because i like it. = i like it so i do it. we went by bus because it was cheaper. = it was cheaper so we went by bus. he cant go to school because of his illness.2) since引導(dǎo)的原因狀語從句一般放于主句之前表示已知的、 顯然的理由(通常被翻譯成“既然”= now that )， 較為正式， 語氣比b

3、ecause弱。 since you are free today, you had better help me with my mathematics. since you dont trust him, you should not employ him. now (that) you are grown up, you should not rely on your parents.3) as 引導(dǎo)原因狀語從句時表示附帶說明的“雙方已知的原因”，含有對比說明的意味， 語氣比since弱， 較為正式， 位置較為靈活(常放于主句之前)。 as it is raining, youd bet

4、ter take a taxi. as you are tired, you had better rest. i went to bed early, as i was exhausted.4) for引導(dǎo)的是并列句表示原因但并不說明主句行為發(fā)生的直接原因， 只提供一些輔助性的補充說明， for引導(dǎo)的并列句只能放于主句之后并且必須用逗號將其與主句隔開。 he could not have seen me, for i was not there. he seldom goes out now, for he is very old. 5.傳播優(yōu)秀word版文檔 ，希望對您有幫助，可雙擊去除！

5、三、目的狀語從句：1、定義：在句中用來作目的狀語的句子叫目的狀語從句。2、常用引導(dǎo)詞: so that (以便), in order that (以便)3、時態(tài)：目的狀語從句一般都是根據(jù)實際情況選用適當(dāng)?shù)臅r態(tài)。也通常是主過從過，主現(xiàn)從現(xiàn)。4、目的狀語從句應(yīng)注意以下：1) 目的狀語從句中常含有can, could, may, might, should, will, would等情態(tài)動詞。i got up early so that i could catch the first bus.2) 在口語中so可以引導(dǎo)目的狀語從句。well sit nearer the front so we ca

6、n hear better.3) in order that與in order to的區(qū)別： in order that +從句 = so that +從句 in order to+ 動詞原形 = so as to + 動詞原形(不放于句首) = to+ 動詞原形i get up early in order to catch the early bus.= i get up early in order that i can catch the early bus.四、結(jié)果狀語從句：1、定義：在句中用來作結(jié)果狀語的句子叫結(jié)果狀語從句。2、常用引導(dǎo)詞: so that (如此以致), such

7、 that (如此以致) 3、時態(tài)：結(jié)果狀語從句一般都是根據(jù)實際情況選用適當(dāng)?shù)臅r態(tài)。也通常是主過從過，主現(xiàn)從現(xiàn)。4、結(jié)果狀語從句的句型：結(jié)果狀語從句的從句部分是補充說明主句中謂語動詞發(fā)生的結(jié)果的，通常位于主句之后。結(jié)果從句中通常不用情態(tài)助動詞，但must, can, could除外。結(jié)果狀語從句其規(guī)律由so與such的不同詞性決定。such 是形容詞，修飾名詞或名詞詞組，so 是副詞，只能修飾形容詞或副詞。 so 還可與表示數(shù)量的形容詞many, few, much, little連用，形成固定搭配。 6.傳播優(yōu)秀word版文檔 ，希望對您有幫助，可雙擊去除！1) so + 形/ 副+ tha

8、t從句 the boy is so young that he cant go to school. he speaks so fast that no one can catch him.2) so + many/few（+復(fù)名）+ that從句there are so many picture-story books that the boy wont leave.3) so + much/ little（+ 不可數(shù)名詞）+that從句he gave me so little time that it was impossible for me to finish the work on

9、time.4) so+ 形+ a/an+ 單名+ that從句it was so hot a day that they wanted to go swimming.5) such+ a/an+ 形+單名+ that從句= so+ 形+ a/an+單名+ that從句he is such a young boy that he cant go to school.= he is so young a boy that he cant go to school.6) such+ 形+ 復(fù)名/不可數(shù)名詞+ that從句 they are such fine teachers that we all

10、 hold them in great respect. it is such nice weather that i would like to go to the beach. 5、結(jié)果狀語從句與簡單句的轉(zhuǎn)換：1) so that (從句為肯定句) = 形/副 + enough + (for sb.) to do sth.he is so old that he can go to school alone.= he is old enough to go to school alone.2) so that (從句為否定句) = too + 形/副 + (for sb.) to do s

11、th. the problem is so hard that i cant work it out. = the problem is too hard for me to work out. = the problem isnt easy enough for me to work out.五、讓步狀語從句1、定義：在句中用來表示“退一步說”的句子叫讓步狀語從句。2、常用引導(dǎo)詞: although (雖然) = though（盡管，即使），no matter+疑問詞=疑問詞-ever（無論），even if = even though（即使），whether. or (不管是還是)等。3、

12、時態(tài)：讓步狀語從句的時態(tài)一般采用主過從過，主將從現(xiàn)的原則。4、讓步狀語從句的注意點：1) although/ though 不可與but連用(二者只選其一)，但可與still / yet連用。 although / though he is very old, still he is quite strong. although he was ill , he went to school. = he was ill but he went to school.傳播優(yōu)秀word版文檔 ，希望對您有幫助，可雙擊去除！ 7.2) no matter + 疑問詞 = 疑問詞-ever “無論”(引導(dǎo)

13、讓步狀語從句可互換) whatever (= no matter what) happened, he would not mind. whoever (= no matter who) you are, you must keep the law. however (=no matter how) expensive it may be, ill take it.注意：“no matter+ 疑問詞” 結(jié)構(gòu)只能引導(dǎo)讓步狀語從句，而 “疑問詞-ever” 還可以引導(dǎo)名詞性從句（主語從句，賓語從句，表語從句和同位語從句）。 ill eat whatever (no matter what) yo

14、u give me. (whatever引導(dǎo)賓語從句) whoever (no matter who) comes will be welcome.(whoever 引導(dǎo)主語從句)六、條件狀語從句1、定義：由引導(dǎo)詞if或unless引導(dǎo)的狀語從句叫做條件狀語從句。2、常用引導(dǎo)詞: if (如果) , unless = ifnot (如果不/ 除非) , so/as long as(只要)3、時態(tài)：條件狀語從句的時態(tài)常采用主將從現(xiàn)原則。 i will come to see you if i have time. lets go out for a walk unless you are too

15、 tired.= lets go out for a walk if you are not too tired. you cant learn english well unless you work hard.= you cant learn english well if you dont work hard. you may borrow my book as long as you keep it clean.注意: “祈使句，+ and / or + 簡單句”是一個固定句型，這里祈使句相當(dāng)于一個由if引導(dǎo)的條件狀語從句：用and引導(dǎo)的簡單句常表示一個較好的結(jié)果，用or引導(dǎo)的簡單句常表示一個不愉快或不理想的結(jié)果；謂語動詞常用一般將來時。即： 祈使句，and + 簡單句(一般將來時) = if you do sth, youll do sth. (這個句型表示“如果做到了祈使句表示的事情，就會有后面句子表示的結(jié)果”。) think hard , and you