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 couldn't vowelise you couldn't vowelise he couldn't vowelise we couldn't vowelise you couldn't vowelise they couldn't vowelise	I couldn't be vowelising you couldn't be vowelising he couldn't be vowelising we couldn't be vowelising you couldn't be vowelising they couldn't be vowelising
Perfect	V-ing perfect
I couldn't have vowelised you couldn't have vowelised he couldn't have vowelised we couldn't have vowelised you couldn't have vowelised they couldn't have vowelised	I couldn't have been vowelising you couldn't have been vowelising he couldn't have been vowelising we couldn't have been vowelising you couldn't have been vowelising they couldn't 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
couldn't I vowelise? couldn't you vowelise? couldn't he vowelise? couldn't we vowelise? couldn't you vowelise? couldn't they vowelise?	couldn't I be vowelising? couldn't you be vowelising? couldn't he be vowelising? couldn't we be vowelising? couldn't you be vowelising? couldn't they be vowelising?
Perfect	V-ing perfect
couldn't I have vowelised? couldn't you have vowelised? couldn't he have vowelised? couldn't we have vowelised? couldn't you have vowelised? couldn't they have vowelised?	couldn't I have been vowelising? couldn't you have been vowelising? couldn't he have been vowelising? couldn't we have been vowelising? couldn't you have been vowelising? couldn't they have been vowelising?