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before和ago用法的区别

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before和ago用法的区别
before和ago用法的区别
比如说:
1 She said,"I saw him three days AGO." 你可以把这句话改写成间接引语,ago就变成了before:
------- She said that she had seen him three days BEFORE
2 时间段+ ago ----------- three days ago / 三天前 /
但:before+时间点-------- before Wednesday / 在星期三以前 /