Student or Learner
He must have known about it,.......he?
I think it would be B if the sentence had adv of time otherwise it must be " hasn't " . Could you help me to answer it?
The opinion of others?
must not he?
As normal tag questions ask for confirmation of the speaker's opinion, with the verb mirrored ('he must... mustn't he?'), I'd question whether the 'didn't he?' version is a tag question at all. It's not asking for confirmation of an opinion; it's asking about a point of fact:
He must have known about it [this is the speaker's inference - it doesn't say anything about what 'he' actually did]. Didn't he?
[The speaker is inviting a correction of his understanding - not confirmation.]
So B is an acceptable answer. I wouldn't call it a tag question though.
I think you'll find only a few Americans would say "mustn't he?" but it's really the only one that truly works.
After all, the original isn't "He [did] know about it, didn't he?"
On the other hand, "haven't" never works with "he." It would need to be "hasn't he" or "hadn't he."
So if it's a test and those are your only choice, choose "didn't."
I am surprised.
Mustn't = must not
Must I not?
In tag questions, the question tag consist of the first (finite) verb of the verb phrase (=operator) plus a pronoun.
The operator in the OP's sentence is "must".
So - pulling it together:
Barb_D: After all, the original isn't "He [did] know about it, didn't he?"
BobK:So B is an acceptable answer. I wouldn't call it a tag question though.
The answer to the query would be (and others feel free to shoot me down in flames):
"He must have known about it, mustn't he? - satisfies BobK's requirement for a proper tag.
pause, with no reply, so the speaker continues:
"Well, did he or didn't he?" - the tag to the tag.
Last edited by David L.; 27-May-2009 at 08:09.