I could associate you could associate she could associate we could associate you could associate they could associate
V-ing form
I could be associating you could be associating she could be associating we could be associating you could be associating they could be associating
Perfect
I could have associated you could have associated she could have associated we could have associated you could have associated they could have associated
V-ing perfect
I could have been associating you could have been associating she could have been associating we could have been associating you could have been associating they could have been associating
Negation
Simple form
I couldn't associate you couldn't associate she couldn't associate we couldn't associate you couldn't associate they couldn't associate
V-ing form
I couldn't be associating you couldn't be associating she couldn't be associating we couldn't be associating you couldn't be associating they couldn't be associating
Perfect
I couldn't have associated you couldn't have associated she couldn't have associated we couldn't have associated you couldn't have associated they couldn't have associated
V-ing perfect
I couldn't have been associating you couldn't have been associating she couldn't have been associating we couldn't have been associating you couldn't have been associating they couldn't have been associating
Interrogative form
Simple form
could I associate? could you associate? could she associate? could we associate? could you associate? could they associate?
V-ing form
could I be associating? could you be associating? could she be associating? could we be associating? could you be associating? could they be associating?
Perfect
could I have associated? could you have associated? could she have associated? could we have associated? could you have associated? could they have associated?
V-ing perfect
could I have been associating? could you have been associating? could she have been associating? could we have been associating? could you have been associating? could they have been associating?
Interro-negative form
Simple form
couldn't I associate? couldn't you associate? couldn't she associate? couldn't we associate? couldn't you associate? couldn't they associate?
V-ing form
couldn't I be associating? couldn't you be associating? couldn't she be associating? couldn't we be associating? couldn't you be associating? couldn't they be associating?
Perfect
couldn't I have associated? couldn't you have associated? couldn't she have associated? couldn't we have associated? couldn't you have associated? couldn't they have associated?
V-ing perfect
couldn't I have been associating? couldn't you have been associating? couldn't she have been associating? couldn't we have been associating? couldn't you have been associating? couldn't they have been associating?