Say we come next week...

I think it's the main verb of an imperative sentence:

Say (that) we come next week.

I'd call it an incomplete sentence.
It could be this:

Let's say we come next week.

I don't know the answer to this, but the verb does not seem to me to be an imperative. The speaker is not telling the listener to say something.

The underying meaning appears to me to be similar to 'let's say (that) ...', as AS suggested. Whilst I agree that the meaning is not dissimilar to 'assume (that)', it could also be even more similar, in my opinion, to 'let's assume (that)' or 'a

CliveI see it a a main verb in the imperative.It's similar to 'Assume (that) we come next week'.Clive

This was my initial impression as well. However, I do agree with all the posters so far!

Anonymous"Say we come next week."

This is clearly an imperative sentence. It means “Suppose we come next week”.

One of the definitions of say is “suppose”.

http://www.merriam-webster.com/dictionary/say

Aspara GusThis is clearly an imperative sentence.

Would that it were clearly an imperative sentence.

fivejedjonWould that it were clearly an imperative sentence.

I think we need to differentiate form from function, that is all. Both 'say' (2nd person simple present) and 'let's say' (3rd person—though the former may be just a contraction of the latter?) are imperative forms, but they do not serve as commands. They offer advice or suggestions.

This is from Macmillan

[transitive] [usually in imperative]http://www.macmillandictionary.com/search/american/direct/?q=to http://www.macmillandictionary.com/search/america

Mister MicawberI think we need to differentiate form from function ...

I agree. I am, however, not sure what form 'say' is.

Mister Micawber Both 'say' (2nd person simple present) and 'let's say' (3rd person—though the former may be just a contraction of the latter?) are imperative forms

How do we know, in this particular cas