As it's written in the title, I want to ask if my sentence sounds correct.
Let them wreak havoc again, shan't we?
If I read that sentence, that doesn't sound like an imperative sentence, I believe. That's why I have my doubt about determining the appropriate question tag (Discussions about the question tag of Let's I'd read, led me into "shall we" which is an imperative sentence).
I had chosen "don't we" at first but I thought "shan't we" would be OK. Is my sentence correct, by the way?
Best Answer
I think you are mixing up tag questions.
with a construction like
This latter is a rhetorical re-ordering of "Will you let him speak?"
It is pretty unusual to use "tag questions" with the imperative. It is possible to have
but you can't add a tag question
So coming back to your phrase, you could have
as rhetorical re-arrangements of
Did you let them wreak havoc again? / Shall we let them wreak havoc again?
But you can't add a "tag question" as in your example. If you are not sure about the rhetorical effect of the re-arrangement you should be careful. It is sarcastic