第十七章状语从句
知识点1状语从句的分类
知识点2时间状语从句的用法
知识点3地点状语从句和条件状语从句的用法
知识点4原因状语从句和让步状语从句的用法
知识点5比较状语从句和方式状语从句的用法
知识点6目的状语从句和结果状语从句的用法
知识详单
知识点1状语从句的分类
状语从句 连词 when, while, as,since ,till, until, before, after, as soon as, no sooner…than, 时间 hardly(scarcely)…when, the minute, the second,every( each time) 地点 条件 where, wherever, everywhere if, unless, as(so) long as ,in case 原因 Because, since, as, now that, seeing that, in that, considering that Though, although, even if(though),。,whatever, wherever, whoever, however. no matter+ wh- As…as…, (not) the same.,not so...。,than as, as if(though) so that, in order that, in case ,for fear that, lest so that, so…that, such... that, but that 让步 比较 方式 目的 结果
知识点2时间状语从句的用法
从属连词 用法 “与……同时,在……期间”,从While 句常用延续性动词或表示状态的词 例句 Don’t talk loud while (as)others are working.别人工作时,请勿大声说话。 It was raining when we arrived.我们到达时,天正下着雨。 when you read the poem a second time, the meaning will become clearer to you.当你再读一遍这首诗, ,你就更清楚它的含义。 “正当,一边·····一边,随As 着”,表示两个动作同时发生或某事发生时,另一个动作发生了 用于肯定句时,表示“直Till/until 到……为止”,主句必须为延续性动词;not.. .until/till表示“直到……才”,主句常用短We shall wait until/till he comes back.我们将一直等到他回来。 I didn't leave until/till she finished her homework.直As time went on, his theory proved to be correct.随着时间的推移,他的理论被证明是正确的。 “当……时”,表示主句的动作和从句的动作同时或先后When 发生,从句的动词可用延续性动词,也可用非延续性动词 暂性动词 到她完成作业.我才离开。 “自……以来”,主句用一般Since 现在时或现在完成时,从句用一般过去时 I have heard。lot of good things about you sin from abroad.自从我从国外回来,我已经听许多好的事情。 He must finish all the work before he goes home.回家之前他必须完成所有的工作。 Before 在……以前 After 在…..之后 Iet's play football after school is over.放学后我们打篮球吧。 【知识拓展】时间状语从句的时态问题:在时间状语从句和条件状语从句中,主句如果使用一般将来时态,从句使用一般现在时表示将来,即所谓的主将从现。例如: As soon as I arrive in Beijing, I will ring you up. 我一到北京就给你打电话。 You'll fall behind the others unless you study hard.如果你不努力学习,你将会落后于其他人。
知识点3地点状语从句和条件状语从句的用法
分类 从属连词 where在……地方,wherever,无论哪里 地点状语从句 例句 Where there is a will,there is a way.有志者,事竟成 Wherever you go,you must obey the law.无论你去哪儿,你都要遵守法律。 if如果;unless除非,如果不 If Y make any mistakes,please point them out in time.如果我犯错误,请及时指出来。 Don't ask me to explain unless you really don't understand.不要让我解释,除非你真的不懂。 in case假使,万一 Write down her telephone number in case you forget.把她的电话号码记下来万一你忘了呢。 条件状语从句 so/as long as只要, 如果 You can go out as/so long as you promise to be back before 11 o'clock.你可以出去,只要你答应在点前回来 【知识拓展】 if引导条件状语从句和宾语从句的区别: ① if引导条件状语从句,表示“如果”,主句用一般将来时态,从句用一 般现在时表示将来。例如: If it doesn't rain, I will go to the cinema tomorrow.如果明天不下雨,我就去看电影。 (2)if引导宾语从句,表示“是否”,如果主句是一般现在时,从句可用各种对应的时态; 如果主句是一般过去时,从句用过去的某种时态。例如: I didn't know if he would come tomorrow.我不知道他明天是否会来。
知识点4原因状语从句和让步状语从句的用法
分类 从属连词 because因为,as,因为,since既然 原因 状语 从句 Now that/in that/seeing that/considering that既然,由于 让步 although/thoug状语 h虽然,尽管 例句 He couldn't have seen me because I was not there. 他不可能看见我,因为我当时不在那儿。 As it rained,we all stayed at home.由于下雨我们都待在家里。 Since we are all here, let's reach a decision now.既然大家都来了,现在让我们做决定吧。 I needn't say anything in that you have known it.由于你已经知道了,我没有必要说什么了。 Considering that he is very young, he does it very well·考虑到他很年轻,他做得很不错了。 Though he is very poor, he is very happy.他虽然很穷,但他很快乐。 Although he is young, he is very clever.他尽管年轻,但很聪明。