what happened to your memory?和 what's happened to your car?在语法上有什么区别.

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what happened to your memory?和 what's happened to your car?在语法上有什么区别.

what happened to your memory?和 what's happened to your car?在语法上有什么区别.
what happened to your memory?和 what's happened to your car?在语法上有什么区别.

what happened to your memory?和 what's happened to your car?在语法上有什么区别.
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.