can與be able to的用法區(qū)別

can與be able to的用法區(qū)別

■時(shí)態(tài)形式(通常不用于進(jìn)行時(shí)或與 be going to 連用), 而且還可以與某些情態(tài)動(dòng)詞連用(通常不與 can 連用), 甚至還可以有非謂語形式

He has not been able to go to school for a week. 他已有一周不能上學(xué)了。

You might be able to persuade him. 你也許能夠說服他。

I hope to be able to do the work. 我希望能干得了這項(xiàng)工作。

I regret not being able to help her. 我很遺憾未能幫助她。

以上用法中的 be able to 均不能用 can 替換。