English verb conjugation
COULD EXTERIORISE

Regular verb: exteriorise - exteriorised - exteriorised

Affirmation

Simple form	V-ing form
I could exteriorise you could exteriorise she could exteriorise we could exteriorise you could exteriorise they could exteriorise	I could be exteriorising you could be exteriorising she could be exteriorising we could be exteriorising you could be exteriorising they could be exteriorising
Perfect	V-ing perfect
I could have exteriorised you could have exteriorised she could have exteriorised we could have exteriorised you could have exteriorised they could have exteriorised	I could have been exteriorising you could have been exteriorising she could have been exteriorising we could have been exteriorising you could have been exteriorising they could have been exteriorising

Negation

Simple form	V-ing form
I couldn't exteriorise you couldn't exteriorise she couldn't exteriorise we couldn't exteriorise you couldn't exteriorise they couldn't exteriorise	I couldn't be exteriorising you couldn't be exteriorising she couldn't be exteriorising we couldn't be exteriorising you couldn't be exteriorising they couldn't be exteriorising
Perfect	V-ing perfect
I couldn't have exteriorised you couldn't have exteriorised she couldn't have exteriorised we couldn't have exteriorised you couldn't have exteriorised they couldn't have exteriorised	I couldn't have been exteriorising you couldn't have been exteriorising she couldn't have been exteriorising we couldn't have been exteriorising you couldn't have been exteriorising they couldn't have been exteriorising

Interrogative form

Simple form	V-ing form
could I exteriorise? could you exteriorise? could she exteriorise? could we exteriorise? could you exteriorise? could they exteriorise?	could I be exteriorising? could you be exteriorising? could she be exteriorising? could we be exteriorising? could you be exteriorising? could they be exteriorising?
Perfect	V-ing perfect
could I have exteriorised? could you have exteriorised? could she have exteriorised? could we have exteriorised? could you have exteriorised? could they have exteriorised?	could I have been exteriorising? could you have been exteriorising? could she have been exteriorising? could we have been exteriorising? could you have been exteriorising? could they have been exteriorising?

Interro-negative form

Simple form	V-ing form
couldn't I exteriorise? couldn't you exteriorise? couldn't she exteriorise? couldn't we exteriorise? couldn't you exteriorise? couldn't they exteriorise?	couldn't I be exteriorising? couldn't you be exteriorising? couldn't she be exteriorising? couldn't we be exteriorising? couldn't you be exteriorising? couldn't they be exteriorising?
Perfect	V-ing perfect
couldn't I have exteriorised? couldn't you have exteriorised? couldn't she have exteriorised? couldn't we have exteriorised? couldn't you have exteriorised? couldn't they have exteriorised?	couldn't I have been exteriorising? couldn't you have been exteriorising? couldn't she have been exteriorising? couldn't we have been exteriorising? couldn't you have been exteriorising? couldn't they have been exteriorising?