问题描述：
请英语高手帮我!为什么下列句子能用两种时态表示
1.how did you know that I was/am peter?
2.she said she was/is going tomorrow.
3.the teacher said that money was not/is not everything.
4.did you say you had/have no money left?
1.how did you know that I was/am peter?
2.she said she was/is going tomorrow.
3.the teacher said that money was not/is not everything.
4.did you say you had/have no money left?
问题解答：
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