we haven't heard from jane for a long time -what do you suppose to her中suppose后为何填has happened

we haven't heard from jane for a long time -what do you suppose to her中suppose后为何填has happened
we haven't heard from jane for a long time -what do you suppose to her中suppose后为何填has happened

we haven't heard from jane for a long time -what do you suppose to her中suppose后为何填has happened
has happened是现在完成时态,句子意思是“我们很长时间没有收到jane的信了,你猜她发生了什么事?”强调的是过去已经发生过的动作对现在的影响,应该用现在完成时态.

因为前一句是完成时