I could marry you could marry he could marry we could marry you could marry they could marry
V-ing form
I could be marrying you could be marrying he could be marrying we could be marrying you could be marrying they could be marrying
Perfect
I could have married you could have married he could have married we could have married you could have married they could have married
V-ing perfect
I could have been marrying you could have been marrying he could have been marrying we could have been marrying you could have been marrying they could have been marrying
Negation
Simple form
I could not marry you could not marry he could not marry we could not marry you could not marry they could not marry
V-ing form
I could not be marrying you could not be marrying he could not be marrying we could not be marrying you could not be marrying they could not be marrying
Perfect
I could not have married you could not have married he could not have married we could not have married you could not have married they could not have married
V-ing perfect
I could not have been marrying you could not have been marrying he could not have been marrying we could not have been marrying you could not have been marrying they could not have been marrying
Interrogative form
Simple form
could I marry? could you marry? could he marry? could we marry? could you marry? could they marry?
V-ing form
could I be marrying? could you be marrying? could he be marrying? could we be marrying? could you be marrying? could they be marrying?
Perfect
could I have married? could you have married? could he have married? could we have married? could you have married? could they have married?
V-ing perfect
could I have been marrying? could you have been marrying? could he have been marrying? could we have been marrying? could you have been marrying? could they have been marrying?
Interro-negative form
Simple form
could I not marry? could you not marry? could he not marry? could we not marry? could you not marry? could they not marry?
V-ing form
could I not be marrying? could you not be marrying? could he not be marrying? could we not be marrying? could you not be marrying? could they not be marrying?
Perfect
could I not have married? could you not have married? could he not have married? could we not have married? could you not have married? could they not have married?
V-ing perfect
could I not have been marrying? could you not have been marrying? could he not have been marrying? could we not have been marrying? could you not have been marrying? could they not have been marrying?