English verb conjugation
COULD VEST

Regular verb: vest - vested - vested

Affirmation

Simple form	V-ing form
I could vest you could vest he could vest we could vest you could vest they could vest	I could be vesting you could be vesting he could be vesting we could be vesting you could be vesting they could be vesting
Perfect	V-ing perfect
I could have vested you could have vested he could have vested we could have vested you could have vested they could have vested	I could have been vesting you could have been vesting he could have been vesting we could have been vesting you could have been vesting they could have been vesting

Negation

Simple form	V-ing form
I couldn't vest you couldn't vest he couldn't vest we couldn't vest you couldn't vest they couldn't vest	I couldn't be vesting you couldn't be vesting he couldn't be vesting we couldn't be vesting you couldn't be vesting they couldn't be vesting
Perfect	V-ing perfect
I couldn't have vested you couldn't have vested he couldn't have vested we couldn't have vested you couldn't have vested they couldn't have vested	I couldn't have been vesting you couldn't have been vesting he couldn't have been vesting we couldn't have been vesting you couldn't have been vesting they couldn't have been vesting

Interrogative form

Simple form	V-ing form
could I vest? could you vest? could he vest? could we vest? could you vest? could they vest?	could I be vesting? could you be vesting? could he be vesting? could we be vesting? could you be vesting? could they be vesting?
Perfect	V-ing perfect
could I have vested? could you have vested? could he have vested? could we have vested? could you have vested? could they have vested?	could I have been vesting? could you have been vesting? could he have been vesting? could we have been vesting? could you have been vesting? could they have been vesting?

Interro-negative form

Simple form	V-ing form
couldn't I vest? couldn't you vest? couldn't he vest? couldn't we vest? couldn't you vest? couldn't they vest?	couldn't I be vesting? couldn't you be vesting? couldn't he be vesting? couldn't we be vesting? couldn't you be vesting? couldn't they be vesting?
Perfect	V-ing perfect
couldn't I have vested? couldn't you have vested? couldn't he have vested? couldn't we have vested? couldn't you have vested? couldn't they have vested?	couldn't I have been vesting? couldn't you have been vesting? couldn't he have been vesting? couldn't we have been vesting? couldn't you have been vesting? couldn't they have been vesting?