(1)I was supposed to go myself,but she went instead since I was tied up with so many things.
(2)She had expected him to say 'yes' ,but he said 'no' instead.
请问,句1中,句意有先后次序,但动词全部用一致的过去时态呢? 而句2也是类似的先后次序,时态却前后不一样?
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