English verb conjugation
COULD TRANQUILISE

Regular verb: tranquilise - tranquilised - tranquilised

Affirmation

Simple form	V-ing form
I could tranquilise you could tranquilise he could tranquilise we could tranquilise you could tranquilise they could tranquilise	I could be tranquilising you could be tranquilising he could be tranquilising we could be tranquilising you could be tranquilising they could be tranquilising
Perfect	V-ing perfect
I could have tranquilised you could have tranquilised he could have tranquilised we could have tranquilised you could have tranquilised they could have tranquilised	I could have been tranquilising you could have been tranquilising he could have been tranquilising we could have been tranquilising you could have been tranquilising they could have been tranquilising

Negation

Simple form	V-ing form
I couldn't tranquilise you couldn't tranquilise he couldn't tranquilise we couldn't tranquilise you couldn't tranquilise they couldn't tranquilise	I couldn't be tranquilising you couldn't be tranquilising he couldn't be tranquilising we couldn't be tranquilising you couldn't be tranquilising they couldn't be tranquilising
Perfect	V-ing perfect
I couldn't have tranquilised you couldn't have tranquilised he couldn't have tranquilised we couldn't have tranquilised you couldn't have tranquilised they couldn't have tranquilised	I couldn't have been tranquilising you couldn't have been tranquilising he couldn't have been tranquilising we couldn't have been tranquilising you couldn't have been tranquilising they couldn't have been tranquilising

Interrogative form

Simple form	V-ing form
could I tranquilise? could you tranquilise? could he tranquilise? could we tranquilise? could you tranquilise? could they tranquilise?	could I be tranquilising? could you be tranquilising? could he be tranquilising? could we be tranquilising? could you be tranquilising? could they be tranquilising?
Perfect	V-ing perfect
could I have tranquilised? could you have tranquilised? could he have tranquilised? could we have tranquilised? could you have tranquilised? could they have tranquilised?	could I have been tranquilising? could you have been tranquilising? could he have been tranquilising? could we have been tranquilising? could you have been tranquilising? could they have been tranquilising?

Interro-negative form

Simple form	V-ing form
couldn't I tranquilise? couldn't you tranquilise? couldn't he tranquilise? couldn't we tranquilise? couldn't you tranquilise? couldn't they tranquilise?	couldn't I be tranquilising? couldn't you be tranquilising? couldn't he be tranquilising? couldn't we be tranquilising? couldn't you be tranquilising? couldn't they be tranquilising?
Perfect	V-ing perfect
couldn't I have tranquilised? couldn't you have tranquilised? couldn't he have tranquilised? couldn't we have tranquilised? couldn't you have tranquilised? couldn't they have tranquilised?	couldn't I have been tranquilising? couldn't you have been tranquilising? couldn't he have been tranquilising? couldn't we have been tranquilising? couldn't you have been tranquilising? couldn't they have been tranquilising?