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 could not tranquilise you could not tranquilise he could not tranquilise we could not tranquilise you could not tranquilise they could not tranquilise	I could not be tranquilising you could not be tranquilising he could not be tranquilising we could not be tranquilising you could not be tranquilising they could not be tranquilising
Perfect	V-ing perfect
I could not have tranquilised you could not have tranquilised he could not have tranquilised we could not have tranquilised you could not have tranquilised they could not have tranquilised	I could not have been tranquilising you could not have been tranquilising he could not have been tranquilising we could not have been tranquilising you could not have been tranquilising they could not 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
could I not tranquilise? could you not tranquilise? could he not tranquilise? could we not tranquilise? could you not tranquilise? could they not tranquilise?	could I not be tranquilising? could you not be tranquilising? could he not be tranquilising? could we not be tranquilising? could you not be tranquilising? could they not be tranquilising?
Perfect	V-ing perfect
could I not have tranquilised? could you not have tranquilised? could he not have tranquilised? could we not have tranquilised? could you not have tranquilised? could they not have tranquilised?	could I not have been tranquilising? could you not have been tranquilising? could he not have been tranquilising? could we not have been tranquilising? could you not have been tranquilising? could they not have been tranquilising?