English verb conjugation
COULD DRIFT

Regular verb: drift - drifted - drifted

Affirmation

Simple form	V-ing form
I could drift you could drift she could drift we could drift you could drift they could drift	I could be drifting you could be drifting she could be drifting we could be drifting you could be drifting they could be drifting
Perfect	V-ing perfect
I could have drifted you could have drifted she could have drifted we could have drifted you could have drifted they could have drifted	I could have been drifting you could have been drifting she could have been drifting we could have been drifting you could have been drifting they could have been drifting

Negation

Simple form	V-ing form
I couldn't drift you couldn't drift she couldn't drift we couldn't drift you couldn't drift they couldn't drift	I couldn't be drifting you couldn't be drifting she couldn't be drifting we couldn't be drifting you couldn't be drifting they couldn't be drifting
Perfect	V-ing perfect
I couldn't have drifted you couldn't have drifted she couldn't have drifted we couldn't have drifted you couldn't have drifted they couldn't have drifted	I couldn't have been drifting you couldn't have been drifting she couldn't have been drifting we couldn't have been drifting you couldn't have been drifting they couldn't have been drifting

Interrogative form

Simple form	V-ing form
could I drift? could you drift? could she drift? could we drift? could you drift? could they drift?	could I be drifting? could you be drifting? could she be drifting? could we be drifting? could you be drifting? could they be drifting?
Perfect	V-ing perfect
could I have drifted? could you have drifted? could she have drifted? could we have drifted? could you have drifted? could they have drifted?	could I have been drifting? could you have been drifting? could she have been drifting? could we have been drifting? could you have been drifting? could they have been drifting?

Interro-negative form

Simple form	V-ing form
couldn't I drift? couldn't you drift? couldn't she drift? couldn't we drift? couldn't you drift? couldn't they drift?	couldn't I be drifting? couldn't you be drifting? couldn't she be drifting? couldn't we be drifting? couldn't you be drifting? couldn't they be drifting?
Perfect	V-ing perfect
couldn't I have drifted? couldn't you have drifted? couldn't she have drifted? couldn't we have drifted? couldn't you have drifted? couldn't they have drifted?	couldn't I have been drifting? couldn't you have been drifting? couldn't she have been drifting? couldn't we have been drifting? couldn't you have been drifting? couldn't they have been drifting?