作业帮虚拟语气中but for,if not,but that的意思及用法
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虚拟语气中but for,if not,but that的意思及用法
虚拟语气中but for,if not,but that的意思及用法
虚拟语气中but for,if not,but that的意思及用法
亲自挨个查的朗文词典,敲上去的
but for
a) used when you are saying that something would have happened if something or someone else had not prevented it:(译成汉语：要不是）
But for these interruptions,the meeting would have finished earlier.
The score could have been higher but for some excellent goalkeeping by Simon.
I might never have got to university but for you.
b) except for something or someone:(译成汉语：除了）
All was silent but for the sound of the wind in the trees.
if not（如果不是/没有的话）
Your car should be ready by 12 o'clock,but if not I'll let you know.
If you don't leave now,I'll call the police.
Try these gloves on.If they're not the right size I'll take them back.
关于,but that,干脆多说几句,顺便讲一下but的用法
在英语中,but除了最常用的表示转折关系外还有以下几种常见用法：
一、but用法连词,表示让步关系,意思是“除非,要不是”,常与that一起构成but that,相当于"if...not".例如：I would have failed but that your helped me.要不是你们帮助我,我就会失败.
二、but用作连词,放在否定词或疑问词之后,作从属关系,表示否定意义,可相当于that not.例如：Never a month passed but she writes to her parents.她没有一个月不给她双亲写信.
三、but用于否定词加doubt,question,deny等到之后,没有实在意义,只相当于关系连词that.例如：There's no doubt but he is a thief.毫无疑问,他是一个贼.
四、but用作介词,表示“除了”意义,相当于besides,except.例如：No one knows him but she.除了她,没有人认识她.
五、but用作副词,相当于only,常译为“只不过,仅仅”.例如：He finished his homework but ten minutes ago.他十分钟前刚完成作业.
六、buy用作代词,表示从属关系,在否定句中常相当于who/that not.例如：There is no one but likes to help him.没有人不认识他.