Therefore的用法

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Therefore的用法

, 一、整句中时一般不放句末,句首后要有逗号,句中1、按一般副词使用2做插入语(这两个分得清吧)

eg.1Thereforewe must learn English well. 2They therefore can learn English well.

3Many fast food restaurant ,therefore,have red furniture or walls. 二、用在分句中,即一个句子一部分表示原因一部分表示结果。 这时一般词前要用分号,其后用不用逗号无所谓。若第二个分句前是逗号或无符号,则要注意therefore是副词,和so不一样,要保持句子完整,应用and therefore

eg.1I had a headache;therefore I could not go to your party. 2I was ill,and therefore could not come.

3These birds are very beautiful and therefore liked by many people. However的用发 1. 用作副词

(1) 表示让步:意为“无论如何”“不管怎样”,用来修饰形容词或副词, 其词序为:however+形容词或副词+主语+谓语。这样用的however其实具有连词的功能,用以引导让步状语从句。如:

however much he eats, he never gets fat. 不管他吃多少,他永远吃不胖。 用于此用法时,请注意以下几点:

①此用法属however所有用法中最重要的考点,同学们务请引起高度重视。 ②这样用的 however no matter how 大致同义。如:

People always want more, however [no matter how] rich they are. 人总是富了还想再富。

however [No matter how] hard I worked, she was never satisfied. 无论我多么努力地工作,她从来没满意过。 ③有时从句谓语可用情态动词。如:

Don’t laugh, however funny it may be. 无论多么有趣也不要笑。

I’ll try to finish it in time, however hard it may be. 无论多么难,我也要按时完成。

④“however+形容词或副词+主语+谓语”有时可以有所省略。如:

I refuse, however favorable the conditions. 不管条件如何有利,我都不干。(conditions后省去了are)

I’d rather have a room of my own, however small (it is), than share a room. 无论房间多么小,我宁愿一个人住一间,而不愿意与别人合住一个房间。 A grammar rule, however true (it is), is useless unless it can be understood. 一条语法规则,不管如何正确,除非能懂,否则毫无用处。

(2) 表示转折:尤其用于谈及一个既成事实时,表示转折,其意为“可是”“仍然”等。可放在句首、句中或句末,通常用逗号与句子其他成分隔开。如: My father, however, did not agree. 但是,我父亲不同意。






My room is small; however, it’s comfortable. 我的房间很小,但却很舒服。 He said that it was so; he was mistaken, however. 他说情况如此,可是他错了。

注:however不能像 but(但是)那样直接连接两个句子(注意正句中的标点符)。如:

我们都已尽了最大的努力,不过我们还是输了。.

正:We all tried our best, but we lost the game.

正:We all tried our best; however, we lost the game. 正:We all tried our best. however, we lost the game.

(3) 表示惊奇或强调:相当于how ever的用法,其意为“究竟怎样,到底以什么方式”。如:

however did you get here without a car? 没有汽车你究竟是怎样来的呢? But的用法

but是转折,带有非常浅的转折和递进义在里面,以至于几乎可以省略,或者使while替代

首句描述母亲动作,次句是人物的状态

首句正常描述,次句揭示问题,引出下文。文学作品里的词语活用很常见,不用钻牛角尖

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