-
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
“
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
与
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。
p>
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。
(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>
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。
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。