"If I hadn't pratised when I was younger,” the musician says,"I____able to play so well now."

"If

I

hadn't

pratised

when

I

was

younger,”

the

musician

says,"I____able

to

play

so

well

now."

为什么答案是"

wouldn't

be

"而不是"

wouldn't

have

done

"？

这是因为：从句和主句的时间不一样，从句是与过去的事实相反，用过去完成时，而主句的时间是now，现在，所以应该与现在的事实相反，用与现在事实相反的wouldn't

be