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