as
as soon as和if区别?
soon as和if区别?
as soon as 引导时间状语从句,意为:一……就……。if引导条件状语从句意为:如果。也可引导宾语从句意为:是否……
assoonas中的第二个as是什么词性?
as soon as 引导时间状语从句,意为“一······就······”。
as soon as 引导从句可以换成什么?
as soon as引导的时间状语从句的规则:若主句为一般将来时,从句常用一般现在时表将来;若主句不是一般将来时,那么从句的时态就要根据上下文来定。
1as soon as的用法
1、指未发生的动作,规律是:主句一般将来时,从句用一般现在时代替一般将来时
如:I will tell him the news as soon as he comes back.
注:有时,为了特意表达刚刚完成某事就如何如何,需要用现在完成时.
如:I will go with you as soon as I have washed my face.
2、指紧接着发生的两个短动作,主从句都用一般过去时
如 He took out his English books as soon as he sat down
不过,我也见过从句和主句都用一般现在时的情况.
when和as soon as的区别?
1. as soon as 引导的从句表示从句动作一发生,主句动作随即发生。通常译为“一…就…”
例如:
Come here as soon as you finish the work.
工作一结束你就到这里来.
2. when 表示某个具体的时间,所引导从句的动作是与主句的动作同时发生,或是先于主句动作。可指一段时间,也可指一点时间,既可表示一时性的动作,又可表示持续性的动作。
例如:
When he returned from work,his wife was cooking.
他下班回家时,他的妻子正在做饭.
3. while只能表示持续性的动作或状态,不能表示一时性或短暂性的动作。
例如:
One day while he was shopping in the supermarket,he saw his ex-wife with a man.
一天,他在超市购物时,他看到了他的前妻和一个男子在一起。