et us assume for a moment that we could indeed fire her

[Kharkhun]

What kinds of modals can complete this question tag? I would choose "should". Is there any possibility for "will" , "would" or "could"?

- Let us assume for a moment that we could indeed fire her. ........ we?

 

[5jj]

None of the modals you mention is likely, though could is possible.

Let us assume for a moment that we could indeed fire her, shall we?

 

[Kharkhun]

Is "should" ungrammatical?

 

[emsr2d2]

Is "should" ungrammatical?

Yes.

 

[Kharkhun]

If so, what's the reason that Longman has used should here.(this is Longman's example in "assume" entry)

 

[emsr2d2]

Are you saying that Longman have given "Let us assume for a moment that we could indeed fire her, should we?" as an example sentence?

 

[emsr2d2]

I have just found that definition online here. There is no question tag. What they have said is:

"Let us assume for a moment that we could indeed fire her. Should we?"

They are two separate entities - a statement and then a question.

 

[Kharkhun]

As I previously asked from you, I wanted to know is it possible to substitute "should" with "would" or "could" for example here? (In these two separate entities)

(Thanks for your explanation, indeed)

 

[emsr2d2]

Yes, as a separate question, "Would we?" is possible. Just bear in mind that it's not a question tag.