if , when , as soon as 的具体用法和需要注意的时态,详细点儿的
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这三个都是从属连词用来连接状语从句,其中if用于连接条件状语从句,而when 和as soon as用于连接时间状语从句。
通常这两类状语从句中的谓语动词,尤其主句为将来进行时的时候,都使用一般现在时表将来的动作或行为,。举例如下:
If you happen to know his number, please telll me.(如果--)
When he comes back, he will come me back.(当--时)
As soon as he fisnished his work, Tom went out hurriedly.(一---就)
通常这两类状语从句中的谓语动词,尤其主句为将来进行时的时候,都使用一般现在时表将来的动作或行为,。举例如下:
If you happen to know his number, please telll me.(如果--)
When he comes back, he will come me back.(当--时)
As soon as he fisnished his work, Tom went out hurriedly.(一---就)
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