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unlEss和iF not的区别

unless和if not都意为“除非,如果不”,下面说说unless和if not的用法区别。 1.两者都表示否定,通常unless和if...not可换用,如: Come tomorrow if I don't phone/unless I phone.如果我不打电话,我明天过来。 I‘ll take the job if the pay's...

一、unless有时可与if…not互换,但此时通常只限于从句所引出的情况为主句情况的一种例外,即此时的unless意思是except if。如: Unless you start at once you’ll be late. =If you don’t start at once you’ll be late. =Except if you start a...

You'll be late if you don't hurry. = You'll be late unless you hurry. I can't catch the train if I don't get up early. = I can't catch the train unless I get up early.

if not表示不然的话,否则.后面不接句子,应该接短语,如If not his help, I would have failed. Unless表示除非,如: My baby sister never cries unless she is hungry. 我刚出生的妹妹除非饿了,她是从来不哭的. I shall go there tomorrow unles...

unless在意义上相当于if…not…,因此在有些场合if…not…可为unless所代替。 但在有些场合又不能互换,当if…not…引导非真实条件分句时,一般不可改用unless。 例如: If she had not had an alarm clock,she would have missedthe train.(事实:她...

unless在意义上相当于if…not…,因此在有些场合if…not…可为unless所代替。但在有些场合又不能互换,我们要注意下面几种情况: 1.当if…not…引导非真实条件分句时,一般不可改用unless。 例如: If she had not had an alarm clock,she would have ...

if和unless的区别:unless=if not; Come tomorrow if I don't phone/unless I phone. 如果我不打电话,我明天过来。 I‘ll take the job if the pay's not too low/unless the pay's too low. 如果工资不是太低,我将从事这份工作。 在下面几种...

unless表示除非,也就是如果不,相当于条件状语从句的否定形式,和if not一般无区别,用法是:主将从现,主句用将来时时,从句可以用一般现在时,如: Unless you are trying to lose weight to please yourself, it's going to be tough to kee...

if和unless的区别:unless=if not; Come tomorrow if I don't phone/unless I phone. 如果我不打电话,我明天过来。 I‘ll take the job if the pay's not too low/unless the pay's too low. 如果工资不是太低,我将从事这份工作。 在下面几种...

2. B 现在完成时的被动结构have been done,法律被通过(pass)了。 B 开头有个though表转折,虽然法律通过了,但是在有些地方却实施得很少。 至于if not 和 unless 我是按意思区分的。如果不 和 除非。 这样就能很好地分开。

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