问题标题：
【Hemusthavebeenasleepatthattime,(wasn't)he?为什么是用wasn't而不是didn't】
问题描述：
Hemusthavebeenasleepatthattime,(wasn't)he?为什么是用wasn't而不是didn't
刘凤岐回答：
情态动词表示推测的句子,完成反义疑问句时,首先要去除推测,还原成普通句子.故Hemusthavebeenasleepatthattime根据atthattime为过去时间,需还原成：Hewasasleepatthattime.中间为be动词的肯定式,故为...
倪守忠回答：
那“Tommusthaveseenthemovielastnight，didn'the？”这里为什么用“didn't”？
刘凤岐回答：
lastnight该用一般过去时，故原句还原成：Tomsawthemovielastnight,didn'the?但：Tommusthaveseenthefilmbefore,hasn'the?原因是：before置于句末常用完成时，故夲句应还原成：Tomhasseenthefilmbefore,hasn'the?
点击显示
英语推荐
热门英语推荐