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 could not vest you could not vest he could not vest we could not vest you could not vest they could not vest	I could not be vesting you could not be vesting he could not be vesting we could not be vesting you could not be vesting they could not be vesting
Perfect	V-ing perfect
I could not have vested you could not have vested he could not have vested we could not have vested you could not have vested they could not have vested	I could not have been vesting you could not have been vesting he could not have been vesting we could not have been vesting you could not have been vesting they could not 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
could I not vest? could you not vest? could he not vest? could we not vest? could you not vest? could they not vest?	could I not be vesting? could you not be vesting? could he not be vesting? could we not be vesting? could you not be vesting? could they not be vesting?
Perfect	V-ing perfect
could I not have vested? could you not have vested? could he not have vested? could we not have vested? could you not have vested? could they not have vested?	could I not have been vesting? could you not have been vesting? could he not have been vesting? could we not have been vesting? could you not have been vesting? could they not have been vesting?