Question

had been somking 什么时态,这个时态怎么用?

Answer 1

1 He says he has been smoking since he was 18 years old.

2 He said he had been smoking since he was 18 years old.

在第1句中是现在完成进行时,在第2句中是过去完成进行时.用法是：从过去到讲话时为止,并且以后可能还会继续.所用的动词必须是延续性动词.