本文目录
as if和as though引导的表语从句
名词性从句只有表语从句，但还可以引导状语从句。
as
if
是连词词组，相当于
as
though
,
意为“好像，好似”，引导表语从句和状语从句。
1
.
as
if
引导表语从句。
as
if
引导表语从句时，可以和
as
though
互换，其句型为：“It
looks
/
seem
as
if
…”，其中
it
本身无词义，是无人称代词，looks
/
seems
是连系动词，as
if
引导表语从句。例如：
It
looks
/
seems
as
if
you
have
got
no
experience
.
看来你似乎并没有经验。
2
.
as
if
引导方式状语从句。
as
if
引导的方式状语从句中，从句中的动词一般要用虚拟语气。若表示与现在事实相反的主观设想，动词用过去式
(be
用
were
，适用于各种人称)；若表示与过去事实相反的主观设想，动词用“had
+
过去分词”形式。例如：
He
acted
as
if
he
were
smoking
.
他那举动好像他抽烟似的。
They
talked
as
if
they
had
been
friends
for
years
.
他们说话很亲热，就像多年的老朋友似的。
如何区分风热感冒与风寒感冒
没错，如果从句前面是look,
seem之类的系动词，则为表语从句。
如果不是，则为方式状语从句了。
如：it
looks
as
if
it's
going
to
rain.
表语从句
he
told
me
everything
as
if
i
were
his
close
friend.
方式状语从句
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as if和as though的区别
一、文法不同
as if 引导的方式状语从句或表语从句，用虚拟语气。
例句： He acts as if he knew me. 他显得认识我似的。
as though 表示与现在事实相反，谓语动词，用would (might, could)+动词原形。
例句：They treat me as though I were a stranger. 他们待我如陌生人。
二、时态不同
as if 表示与过去事实相反，用过去完成时。
例句：This meat tastes as if it has already gone bad. 这肉吃起来似乎已经坏了。
as though 表示将来的可能性不大，用一般过去时。
例句：I feel as though I’m floating on air. 他感到好像漂浮在空中。
三、语境不同
as if 用来描述比较悲惨的境遇或者状况。
例句：It is not as if he were poor. 他不像穷的样子(或他又不穷)。
as though 语境属于中性，可以用到很多情境中。
例句：It is not as though you were going away for good. 又不是你离开不回来了。
as if 引导什么状语从句
1．引导表语从句，
常与as,look,
seem,feel,taste,smell,sound等系动词连用。如：She
looks
as
if
she
were
ten
years
younger．
她看起来好像年轻了十岁。
2.
引导方式状语从句，表示“事情是怎么做的”或“一个人或事物是什么样的”。如：She
loves
the
boy
as
if
she
were
his
mother．
她爱这男孩，就好像她是他的妈妈一样。
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