should和could和need的区别,着急!
人气：175 ℃ 时间：2020-01-29 06:45:19
解答
1. can (could)1）表示能力,could主要指过去时间.Two eyes can see more than one. 两只眼比一只眼看得清.Could the girl read before she went to school? 这女孩上学前能识字吗?2）表示可能（理论上或是逻辑判断上...
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