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