2021-09-23 14:10:31 教师招聘考试网 jl.huatu.com 文章来源:华图教育
2021吉林教师招聘考试:语法考点荟萃--连词(二)
连词用法辨析
(1)because,as,since,for的用法区别
① because“因为”,表示原因的语气最强,可用来回答why提出的问题,常表示必然的因果关系,从句一般放在主句后面;另外,可以引导表语从句,可用于强调句等,而其余三者则不行。例:
He is not at school today because he is seriously ill.(他今天没有上学因为他病得厉害。)
② as“因为”,表示一般的因果关系,语气比because弱,说明比较明显的原因,它引导的从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.(因他未及时准备好,我们没等他就走了。)
③ since“既然”,表示对方已经知道、无需加以说明的原因或事实。例:
I will ask Lin Tao to go with me since you are very busy.(既然你很忙我就叫林涛和我一起去吧。)
④ for“因为”,是并列连词(其余三者为从属连词),语气较弱,用来补充说明理由或提供一种解释。例:
It must have rained last night, for the ground is wet this morning.(昨晚一定下过雨,你看今天早上地面是湿的。)
(2)when,while,as的用法区别
① while引导的时间状语从句的谓语动词必须是可延续的,而when引导的时间状语从句的谓语动词是可延续的,也可以是表短暂性动作的动词。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从句动作发生在主句动作之前时,只能用when引导这个从句,不可用as或while。
When you have finished your work, you may have a rest.
③表示“随着……”,连词用as,不用when或while。例:
As the election approached, the violence got worse.
(3)if,whether的用法区别
①互换的场合
引导宾语从句表示“是否”时,两者常可互换。例:
He didn’t tell me if / whether he would come.(他没有告诉我他是否会来。)
②通常用if的场合
★当引导一个否定的宾语从句时,通常用if而不用whether。例:
She asked me if Tom didn’t come.(她问我Tom是不是没有来。)
★若是引导条件状语从句,则只能用if(意为“如果”)。
③通常用whether的场合
★引导主语从句且放在句首时。例:
Whether he will come is still a question.(他是否会来还是个问题。)
注:若在句首使用形式主语it,而将主语从句放在句末,则有时也可用 if 来引导。例:
It was not known whether / if he would come.(不知他是否会来。)
★引导表语从句时。例:
The question is whether we should go on with the work.(问题是我们是否应该继续进行这项工作。)
★引导宾语从句且放在句首时。例:
Whether he is single I don’t know.(他是否单身,我不知道。)
★引导让步状语从句时。例:
Whether he agrees or not, I shall do that.(不管他同意与否,我都要那样做。)
★与or连用分别引导两个从句时。例:
I don’t know whether he is wrong or she is wrong.(我不知道是他错了,还是她错了。)
★用于不定式之前时。例:
I didn’t know whether to laugh or to cry.(我真是哭笑不得。)
★用于介词之后时。例:
It depends on whether the letter arrives in time.(这取决于信是否来得及时。)
★直接与or not 连用时。例:
I will write to you whether or not I can come.(我能不能来,我将写信告诉你。)
【典型例题】
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:考查状语从句的用法。句意:厌恶了她无尽的抱怨,她还未来得及张嘴我就走出了房间。Before在……之前,未来得及。故选A。
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