英語狀語從句知識點
引導(dǎo)條件狀語從句的從屬連詞有if, unless (=if…not如果不……,除非), as/so long as(只要), while(=as long as只要), supposing (that)/provided /providing (that)(假如), in case(假使), on condition that(在……的條件下)等。如:
You can learn anything so long as you set your mind to learn it. 用心學(xué)本領(lǐng),總能學(xué)到手。
I will go there tomorrow unless it rains.(=…if it doesn’t rain)除非下雨,否則我明天要去那兒。
He will do the work providing you pay him. 如果你能付費,他可以做這工作。
In case l forget,please remind me about it. 如果我忘了,請?zhí)嵝盐摇?/p>
We’ll let you use the room on condition that you keep it clean and tidy. 我們可以讓你使用這個房間,條件是你把它保持整潔。
注:條件狀語從句和時間狀語從句一樣,從句的謂語動詞不能用一般將來時態(tài)、過去將來時態(tài)或?qū)硗瓿蓵r,而要用相應(yīng)的一般現(xiàn)在時、一般過去時和現(xiàn)在完成時態(tài)來替代。又如:
Tell me in case you get into difficulty. 遇到困難請告訴我。
Supposing he does not come, shall we go without him? 如果他不來,是不是不帶他去?
但若從句謂語用了will 或 would,那 will 或 would 則是表示“愿意”的情態(tài)動詞。如:
If you will go with me, I’ll wait for you. 如果你愿意等我,我們就幫你做這事兒。
談?wù)劆钫Z從句的省略問題
為了簡潔起見,有的狀語從句(如時間狀語從句、條件狀語從句、方式狀語從句等)有時可省略從句的主語和部分謂語(尤其是當從句主語與主句主語一致,且從句謂語包括有動詞be時):
She fell asleep while (he was) doing his homework.
他在做作業(yè)時睡著了。
While (he was) doing so, he trembled a little.
他這樣做時稍稍顫抖了一下。
He opened his mouth as if (he was) to speak.
他張開口,好像要說話似的.。
Often she would weep when (she was) alone.
她一個人時,常?奁。
I’d like to see you whenever (it’s) convenient.
在你方便的時候我想來看看你。
If (you are) traveling north,you must change at Leeds.
如果你是向北行,你必須在里茲換車。
【注】有些由if構(gòu)成的省略結(jié)構(gòu),已屬固定短語,如if any, if necessary, if possible, if not, if so:
There are few, if any, mistakes in that book.
那本書就是有錯誤也不多。
If necessary, ring me at home.
如果必要,可以打電話到我家找我。
If possible, I wish to go there next summer.
如果可能,我希望明年夏天去。
He may be busy. If so, I’ll call later. If not, can I see him now?
他可能很忙,要是這樣,我以后再來拜訪。要是不忙,我現(xiàn)在可以見他嗎?
分詞作狀語的主要用法
1. 表時間
Seeing the cat, the mouse ran off. 見到貓,老鼠就跑了。
The work finished, he went home. 工作做完后,他就回家了。
2. 表原因
Being very weak, she couldn't move. 她由于身體虛弱而不能行動。
His car broken down, he had to walk. 他的車壞了,所以只好走路。
3. 表條件
United, we stand; divided, we fall. 團結(jié)則存,分裂則亡。
Given more time, we could have done it better. 如果多給點時間,我們可以做得更好。
Working hard, you will succeed. 如果努力工作,你就可以成功。
Adding them all up, we can find the answer. 如果把它們加起來,我們就可以得到答案。
4. 表讓步
Although living miles away, he attended the course. 雖然住在幾英里以外,他仍去上課。
Defeated, he remained a popular boxer. 雖然被擊敗了,他仍是一個受歡迎的拳擊手。
5. 表方式
He earns a living driving a truck. 他靠開卡車謀取生。
I'm returning you letter as requested. 我按要求給你退信。
6. 表伴隨
He sat in the chair reading newspapers. 他坐在椅子上看報。
Don't you sit there doing nothing. 別什么也不干坐在那里。
He came in, followed by his wife. 他走了進來,后面跟著他的妻子。
7. 表結(jié)果
He fired, killing one of the passers-by. 他開槍了,打死了一個過路人。
He died, leaving his wife with five children. 他死了,留下他妻子和五個兒子。
It rained and rained, vehicles bogged and bridges washed out. 雨不停地下,車輛陷入泥沼,橋梁被水沖去。
【英語狀語從句知識點】相關(guān)文章:
職稱英語語法知識點:時間狀語從句07-29
職稱英語:引導(dǎo)讓步狀語從句應(yīng)用04-16
職稱英語重點語法講解--狀語從句01-18
職稱英語語法之地點狀語從句01-19
大學(xué)英語六級基礎(chǔ)語法知識:讓步狀語從句12-24
大學(xué)英語六級基礎(chǔ)語法知識:方式狀語從句12-23
職稱英語語法:定語從句的用法06-09
復(fù)合從句考博英語閱讀理解句型剖析03-28
with定語從句造句08-01