3.3He didn't know whether she is going to speak at the meeting.is错了应该改为 为什么

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3.3He didn't know whether she is going to speak at the meeting.is错了应该改为 为什么

3.3He didn't know whether she is going to speak at the meeting.is错了应该改为 为什么
3.3He didn't know whether she is going to speak at the meeting.
is错了应该改为 为什么

3.3He didn't know whether she is going to speak at the meeting.is错了应该改为 为什么
is应该改成was
主句是过去式,所以从句也要用过去式