to do 和 to have done

问题描述:

to do 和 to have done
Why didn't you give me a ring?
Well,i meant ( ) ,but later i forgot.
have telephoned
为什么不填to telephone?
to do 和to have done 的区别?

mean to do表示打算、计划做,mean to have done则是表示本来打算做但实际上没做,是虚拟语气的用法.
这句话的意思是:
你为什么不打电话给我呢?
我本来想打的,但后来忘记了.