English verb conjugation
COULD VOWELISE

Regular verb: vowelise - vowelised - vowelised

Affirmation

Simple form	V-ing form
I could vowelise you could vowelise he could vowelise we could vowelise you could vowelise they could vowelise	I could be vowelising you could be vowelising he could be vowelising we could be vowelising you could be vowelising they could be vowelising
Perfect	V-ing perfect
I could have vowelised you could have vowelised he could have vowelised we could have vowelised you could have vowelised they could have vowelised	I could have been vowelising you could have been vowelising he could have been vowelising we could have been vowelising you could have been vowelising they could have been vowelising

Negation

Simple form	V-ing form
I could not vowelise you could not vowelise he could not vowelise we could not vowelise you could not vowelise they could not vowelise	I could not be vowelising you could not be vowelising he could not be vowelising we could not be vowelising you could not be vowelising they could not be vowelising
Perfect	V-ing perfect
I could not have vowelised you could not have vowelised he could not have vowelised we could not have vowelised you could not have vowelised they could not have vowelised	I could not have been vowelising you could not have been vowelising he could not have been vowelising we could not have been vowelising you could not have been vowelising they could not have been vowelising

Interrogative form

Simple form	V-ing form
could I vowelise? could you vowelise? could he vowelise? could we vowelise? could you vowelise? could they vowelise?	could I be vowelising? could you be vowelising? could he be vowelising? could we be vowelising? could you be vowelising? could they be vowelising?
Perfect	V-ing perfect
could I have vowelised? could you have vowelised? could he have vowelised? could we have vowelised? could you have vowelised? could they have vowelised?	could I have been vowelising? could you have been vowelising? could he have been vowelising? could we have been vowelising? could you have been vowelising? could they have been vowelising?

Interro-negative form

Simple form	V-ing form
could I not vowelise? could you not vowelise? could he not vowelise? could we not vowelise? could you not vowelise? could they not vowelise?	could I not be vowelising? could you not be vowelising? could he not be vowelising? could we not be vowelising? could you not be vowelising? could they not be vowelising?
Perfect	V-ing perfect
could I not have vowelised? could you not have vowelised? could he not have vowelised? could we not have vowelised? could you not have vowelised? could they not have vowelised?	could I not have been vowelising? could you not have been vowelising? could he not have been vowelising? could we not have been vowelising? could you not have been vowelising? could they not have been vowelising?