http://liaoning.hteacher.net 2023-06-05 18:03 遼寧教師招聘 [您的教師考試網(wǎng)]
連詞用法辨析
(1)because,as,since,for的用法區(qū)別
① because“因?yàn)?rdquo;,表示原因的語(yǔ)氣最強(qiáng),可用來回答why提出的問題,常表示必然的因果關(guān)系,從句一般放在主句后面;另外,可以引導(dǎo)表語(yǔ)從句,可用于強(qiáng)調(diào)句等,而其余三者則不行。例:
He is not at school today because he is seriously ill.(他今天沒有上學(xué)因?yàn)樗〉脜柡Α?
② as“因?yàn)?rdquo;,表示一般的因果關(guān)系,語(yǔ)氣比because弱,說明比較明顯的原因,它引導(dǎo)的從句可以放在句首也可以放在句尾。例:
As he wasn’t ready in time, we went without him.(因他未及時(shí)準(zhǔn)備好,我們沒等他就走了。)
③ since“既然”,表示對(duì)方已經(jīng)知道、無需加以說明的原因或事實(shí)。例:
I will ask Lin Tao to go with me since you are very busy.(既然你很忙我就叫林濤和我一起去吧。)
④ for“因?yàn)?rdquo;,是并列連詞(其余三者為從屬連詞),語(yǔ)氣較弱,用來補(bǔ)充說明理由或提供一種解釋。例:
It must have rained last night, for the ground is wet this morning.(昨晚一定下過雨,你看今天早上地面是濕的。)
(2)when,while,as的用法區(qū)別
① while引導(dǎo)的時(shí)間狀語(yǔ)從句的謂語(yǔ)動(dòng)詞必須是可延續(xù)的,而when引導(dǎo)的時(shí)間狀語(yǔ)從句的謂語(yǔ)動(dòng)詞是可延續(xù)的,也可以是表短暫性動(dòng)作的動(dòng)詞。例:
When / While he was eating his breakfast, he heard the doorbell ring.
When I stopped my car, a man came up to me.(不可以用while)
②從句動(dòng)作發(fā)生在主句動(dòng)作之前時(shí),只能用when引導(dǎo)這個(gè)從句,不可用as或while。
When you have finished your work, you may have a rest.
③表示“隨著……”,連詞用as,不用when或while。例:
As the election approached, the violence got worse.
(3)if,whether的用法區(qū)別
①互換的場(chǎng)合
引導(dǎo)賓語(yǔ)從句表示“是否”時(shí),兩者??苫Q。例:
He didn’t tell me if / whether he would come.(他沒有告訴我他是否會(huì)來。)
②通常用if的場(chǎng)合
★當(dāng)引導(dǎo)一個(gè)否定的賓語(yǔ)從句時(shí),通常用if而不用whether。例:
She asked me if Tom didn’t come.(她問我Tom是不是沒有來。)
★若是引導(dǎo)條件狀語(yǔ)從句,則只能用if(意為“如果”)。
③通常用whether的場(chǎng)合
★引導(dǎo)主語(yǔ)從句且放在句首時(shí)。例:
Whether he will come is still a question.(他是否會(huì)來還是個(gè)問題。)
注:若在句首使用形式主語(yǔ)it,而將主語(yǔ)從句放在句末,則有時(shí)也可用 if 來引導(dǎo)。例:
It was not known whether / if he would come.(不知他是否會(huì)來。)
★引導(dǎo)表語(yǔ)從句時(shí)。例:
The question is whether we should go on with the work.(問題是我們是否應(yīng)該繼續(xù)進(jìn)行這項(xiàng)工作。)
★引導(dǎo)賓語(yǔ)從句且放在句首時(shí)。例:
Whether he is single I don’t know.(他是否單身,我不知道。)
★引導(dǎo)讓步狀語(yǔ)從句時(shí)。例:
Whether he agrees or not, I shall do that.(不管他同意與否,我都要那樣做。)
★與or連用分別引導(dǎo)兩個(gè)從句時(shí)。例:
I don’t know whether he is wrong or she is wrong.(我不知道是他錯(cuò)了,還是她錯(cuò)了。)
★用于不定式之前時(shí)。例:
I didn’t know whether to laugh or to cry.(我真是哭笑不得。)
★用于介詞之后時(shí)。例:
It depends on whether the letter arrives in time.(這取決于信是否來得及時(shí)。)
★直接與or not 連用時(shí)。例:
I will write to you whether or not I can come.(我能不能來,我將寫信告訴你。)
【典型例題】
Tired of her endless complaints, I walked out of the room _____ she could open her mouth.
A. before B. until C. when D. once
【答案】A。解析:考查狀語(yǔ)從句的用法。句意:厭惡了她無盡的抱怨,她還未來得及張嘴我就走出了房間。Before在……之前,未來得及。故選A。
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