I'm sorry I____(not hear)you clearly.

I'm sorry I____(not hear)you clearly.
I'm sorry I____(not hear)you clearly.

I'm sorry I____(not hear)you clearly.
didn`t hear 因为你讲话是过去讲的,我没有听清也是刚才没有听清所以一定要用过去时态～

didn't hear
hear动作发生在道歉之前 所以需要用过去时

didn't hear

I'm sorry I didn't hear you clearly

don't hear

don't hear

didn't hear
很显然不能用do 更不是完成时 因为你不可能一直在听不清

didn't
因为是表示过去没有听清楚，而不是现在
所以用didn't

didn't 听这个动作已经过去了

can't hear ; didn't hear