Student or Learner
English Lessons - Grammar
In the above link we can see such a sentence:
He must have seen it, mustn't he?
This is the first time I have seen such a question tag as with 'must have done'. In China's English tests or examinations, such a tag is thought to be absolutely wrong. They say we must use 'hasn't he?'. They also say we must say 'He must have seen it yesterday, didn't he?'
I thought 'mustn't he?' was fine, but I had never found any proof. Now that I've got this sentence, I'd like to know how authoritative it is and whether we can use this sentence at all.
Might I ask native English teachers to help me clarify this puzzle of mine?
Thank you very much.
Last edited by BobK; 20-Mar-2008 at 11:25. Reason: Added, to clarify implied ellipsis