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