We could have _____ lunch with them. Which of the following options correctly completes the sentence above?

Question

A. ate
B. eat
C. eaten
D. had ate

I think A

Answer 1

No.

Answer 2

http://www.ehow.com/about_5087285_past-perfect-tense.html

Answer 3

C is right.

Answer 4

Thank you, Reed and Ms. Sue

Answer 5

You are welcome. :)