what happened to your memory?和 what's happened to your car?在语法上有什么区别.
问题描述:
what happened to your memory?和 what's happened to your car?在语法上有什么区别.
答
从时态上来看:what happened to your memory?是一般过去时.
what's happened to your car?是现在完成时,‘s 是has 的缩写.