请问一下:since从句对应的主句动词可以是非延续性动词吗?比如:
Since I saw him, I have changed my mind.
since从句对应的主句动词可以是延续性动词(表示“自从……以后一直……”),也可以是非延续性动词(表示“自从……以后已经……”)。如:
Since I saw him, I have changed my mind. 见到他后我就改变了主意。
He has changed much since I saw him last. 自我上次见他后,他变化很大。
It has been (=It is) three years since I saw him. 我已经有三年没见到他了。