English verb conjugation
COULD VULCANISE

Regular verb: vulcanise - vulcanised - vulcanised

Affirmation

Simple form	V-ing form
I could vulcanise you could vulcanise he could vulcanise we could vulcanise you could vulcanise they could vulcanise	I could be vulcanising you could be vulcanising he could be vulcanising we could be vulcanising you could be vulcanising they could be vulcanising
Perfect	V-ing perfect
I could have vulcanised you could have vulcanised he could have vulcanised we could have vulcanised you could have vulcanised they could have vulcanised	I could have been vulcanising you could have been vulcanising he could have been vulcanising we could have been vulcanising you could have been vulcanising they could have been vulcanising

Negation

Simple form	V-ing form
I could not vulcanise you could not vulcanise he could not vulcanise we could not vulcanise you could not vulcanise they could not vulcanise	I could not be vulcanising you could not be vulcanising he could not be vulcanising we could not be vulcanising you could not be vulcanising they could not be vulcanising
Perfect	V-ing perfect
I could not have vulcanised you could not have vulcanised he could not have vulcanised we could not have vulcanised you could not have vulcanised they could not have vulcanised	I could not have been vulcanising you could not have been vulcanising he could not have been vulcanising we could not have been vulcanising you could not have been vulcanising they could not have been vulcanising

Interrogative form

Simple form	V-ing form
could I vulcanise? could you vulcanise? could he vulcanise? could we vulcanise? could you vulcanise? could they vulcanise?	could I be vulcanising? could you be vulcanising? could he be vulcanising? could we be vulcanising? could you be vulcanising? could they be vulcanising?
Perfect	V-ing perfect
could I have vulcanised? could you have vulcanised? could he have vulcanised? could we have vulcanised? could you have vulcanised? could they have vulcanised?	could I have been vulcanising? could you have been vulcanising? could he have been vulcanising? could we have been vulcanising? could you have been vulcanising? could they have been vulcanising?

Interro-negative form

Simple form	V-ing form
could I not vulcanise? could you not vulcanise? could he not vulcanise? could we not vulcanise? could you not vulcanise? could they not vulcanise?	could I not be vulcanising? could you not be vulcanising? could he not be vulcanising? could we not be vulcanising? could you not be vulcanising? could they not be vulcanising?
Perfect	V-ing perfect
could I not have vulcanised? could you not have vulcanised? could he not have vulcanised? could we not have vulcanised? could you not have vulcanised? could they not have vulcanised?	could I not have been vulcanising? could you not have been vulcanising? could he not have been vulcanising? could we not have been vulcanising? could you not have been vulcanising? could they not have been vulcanising?