I could banquet you could banquet he could banquet we could banquet you could banquet they could banquet
V-ing form
I could be banqueting you could be banqueting he could be banqueting we could be banqueting you could be banqueting they could be banqueting
Perfect
I could have banqueted you could have banqueted he could have banqueted we could have banqueted you could have banqueted they could have banqueted
V-ing perfect
I could have been banqueting you could have been banqueting he could have been banqueting we could have been banqueting you could have been banqueting they could have been banqueting
Negation
Simple form
I couldn't banquet you couldn't banquet he couldn't banquet we couldn't banquet you couldn't banquet they couldn't banquet
V-ing form
I couldn't be banqueting you couldn't be banqueting he couldn't be banqueting we couldn't be banqueting you couldn't be banqueting they couldn't be banqueting
Perfect
I couldn't have banqueted you couldn't have banqueted he couldn't have banqueted we couldn't have banqueted you couldn't have banqueted they couldn't have banqueted
V-ing perfect
I couldn't have been banqueting you couldn't have been banqueting he couldn't have been banqueting we couldn't have been banqueting you couldn't have been banqueting they couldn't have been banqueting
Interrogative form
Simple form
could I banquet? could you banquet? could he banquet? could we banquet? could you banquet? could they banquet?
V-ing form
could I be banqueting? could you be banqueting? could he be banqueting? could we be banqueting? could you be banqueting? could they be banqueting?
Perfect
could I have banqueted? could you have banqueted? could he have banqueted? could we have banqueted? could you have banqueted? could they have banqueted?
V-ing perfect
could I have been banqueting? could you have been banqueting? could he have been banqueting? could we have been banqueting? could you have been banqueting? could they have been banqueting?
Interro-negative form
Simple form
couldn't I banquet? couldn't you banquet? couldn't he banquet? couldn't we banquet? couldn't you banquet? couldn't they banquet?
V-ing form
couldn't I be banqueting? couldn't you be banqueting? couldn't he be banqueting? couldn't we be banqueting? couldn't you be banqueting? couldn't they be banqueting?
Perfect
couldn't I have banqueted? couldn't you have banqueted? couldn't he have banqueted? couldn't we have banqueted? couldn't you have banqueted? couldn't they have banqueted?
V-ing perfect
couldn't I have been banqueting? couldn't you have been banqueting? couldn't he have been banqueting? couldn't we have been banqueting? couldn't you have been banqueting? couldn't they have been banqueting?