English verb conjugation
COULD CURVET

Regular verb: curvet - curveted - curveted

Affirmation

Simple form	V-ing form
I could curvet you could curvet he could curvet we could curvet you could curvet they could curvet	I could be curveting you could be curveting he could be curveting we could be curveting you could be curveting they could be curveting
Perfect	V-ing perfect
I could have curveted you could have curveted he could have curveted we could have curveted you could have curveted they could have curveted	I could have been curveting you could have been curveting he could have been curveting we could have been curveting you could have been curveting they could have been curveting

Negation

Simple form	V-ing form
I couldn't curvet you couldn't curvet he couldn't curvet we couldn't curvet you couldn't curvet they couldn't curvet	I couldn't be curveting you couldn't be curveting he couldn't be curveting we couldn't be curveting you couldn't be curveting they couldn't be curveting
Perfect	V-ing perfect
I couldn't have curveted you couldn't have curveted he couldn't have curveted we couldn't have curveted you couldn't have curveted they couldn't have curveted	I couldn't have been curveting you couldn't have been curveting he couldn't have been curveting we couldn't have been curveting you couldn't have been curveting they couldn't have been curveting

Interrogative form

Simple form	V-ing form
could I curvet? could you curvet? could he curvet? could we curvet? could you curvet? could they curvet?	could I be curveting? could you be curveting? could he be curveting? could we be curveting? could you be curveting? could they be curveting?
Perfect	V-ing perfect
could I have curveted? could you have curveted? could he have curveted? could we have curveted? could you have curveted? could they have curveted?	could I have been curveting? could you have been curveting? could he have been curveting? could we have been curveting? could you have been curveting? could they have been curveting?

Interro-negative form

Simple form	V-ing form
couldn't I curvet? couldn't you curvet? couldn't he curvet? couldn't we curvet? couldn't you curvet? couldn't they curvet?	couldn't I be curveting? couldn't you be curveting? couldn't he be curveting? couldn't we be curveting? couldn't you be curveting? couldn't they be curveting?
Perfect	V-ing perfect
couldn't I have curveted? couldn't you have curveted? couldn't he have curveted? couldn't we have curveted? couldn't you have curveted? couldn't they have curveted?	couldn't I have been curveting? couldn't you have been curveting? couldn't he have been curveting? couldn't we have been curveting? couldn't you have been curveting? couldn't they have been curveting?