來源:網(wǎng)絡(luò)來源 作者:中考網(wǎng)編輯 2021-03-21 18:47:53
中考網(wǎng)整理了關(guān)于2021中考英語連詞知識(shí)點(diǎn)之常用連詞的用法辨析,希望對(duì)同學(xué)們有所幫助,僅供參考。
。1)while, when, as
這三個(gè)連詞都可引導(dǎo)時(shí)間狀語從句,但用法有所不同。
1)當(dāng)某事正在進(jìn)行的時(shí)候,又發(fā)生了另一件事。While, when, as 都可用來引導(dǎo)表示“背景”的時(shí)間狀語從句。例如:
As/When/While I was walking down the street I noticed a police car.
2)當(dāng)兩個(gè)長動(dòng)作同時(shí)進(jìn)行的時(shí)候,最常用的是while。例如:
While mother was cooking lunch, I was doing my homework.
3)當(dāng)兩個(gè)動(dòng)作都表示發(fā)展變化的情況時(shí),最常用的是as。例如:
As children get older, they become more and more interested in things around them.
4)當(dāng)兩個(gè)短動(dòng)作同時(shí)發(fā)生時(shí),或表示“一邊…一邊…”時(shí),最常用as。例如:
Just as he caught the fly, he gave a loud cry.
She looked behind from time to time as she went
5)當(dāng)從句的動(dòng)作先于主句的動(dòng)作時(shí),通常用when。例如:
When he finished his work, he took a short rest.
6)當(dāng)從句是瞬間動(dòng)作,主句是延續(xù)性動(dòng)作時(shí),通常用when。例如:
When John arrived I was cooking lunch.
。2)as, because, since , for
這四個(gè)詞都可表原因,但用法有區(qū)別。
1)如果原因構(gòu)成句子的最主要部分,一般用because。因此,because引導(dǎo)的從句往往放在句末。例如:
I stayed at home because it rained.
---Why aren’t you going?
---Because I don’t want to.
2)如果原因已被人們所知,或不如句子的其它部分重要,就用as或since。Since比as稍微正式一點(diǎn)。As和since 引導(dǎo)的從句一般放在句子的開頭。例如:
As he wasn’t ready, we left without him.
Since I have no money, I can’t buy any food.
3)for用來補(bǔ)充說明一種理由,因此,for引導(dǎo)的從句幾乎可以放在括號(hào)里。For引導(dǎo)的句子不放在句子的開頭。例如:
I decided to stop and have lunch----for I was feeling quite hungry.www.zhongkao5.com//
。3)if, whether
if和whether都可作“是否”講,在引導(dǎo)賓與從句是一般可互換。例如:
I wonder whether (if) you still study in that school.
I don’t know whether (if) he likes that film.
在下列情況下,只能用whether,不能用if:
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