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Therefore的用法

作者:高考题库网
来源:https://www.bjmy2z.cn/gaokao
2021-02-10 16:10
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2021年2月10日发(作者:成绩斐然)



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)



e g.1



Therefore



we must learn English well.





2



They therefore can learn English well.





3



Many 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


ther efore


是副词,和


so


不一样,要 保持句子完整,应用


and


therefore




eg.1



I had a headache;therefore I could not go to your party.





2



I was ill,and therefore could not come.


3



These


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


< p>
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


+< /p>


主语


+


谓语。这样用的

< br>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 i


t in time, however hard it may be.


无论多么难,


我也要按时完成。




“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。


(c onditions


后省去了


are)


I’d rather have a room of my own, however small (it is), than share a room.

< br>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. < /p>



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。



M


y 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。



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