Adding a suitable tag: They must have stayed at home last night.

admin2017-11-06  48

问题 Adding a suitable tag:
They must have stayed at home last night.

选项

答案They must have stayed at home last night,didn’t/mustn’t they?

解析 本题要求添加附加疑问句。本句中含有情态动词must和完成体的助动词have,因此其附加疑问句有两种形式。但如果句中含有明显的时间状语last night,要选用助动词did而不是have。
转载请注明原文地址:https://kaotiyun.com/show/0Eyx777K
0

最新回复(0)