They can’t have been doing their homework--句中“can't"是不是可以直接去掉,从语法上来讲没有错啊?还有They can’t have been doing their homework能改成:They haven't been doing their homework
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/14 02:56:54
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