English verb conjugation
COULD PRESTERILISE

Regular verb: presterilise - presterilised - presterilised

Affirmation

Simple form	V-ing form
I could presterilise you could presterilise he could presterilise we could presterilise you could presterilise they could presterilise	I could be presterilising you could be presterilising he could be presterilising we could be presterilising you could be presterilising they could be presterilising
Perfect	V-ing perfect
I could have presterilised you could have presterilised he could have presterilised we could have presterilised you could have presterilised they could have presterilised	I could have been presterilising you could have been presterilising he could have been presterilising we could have been presterilising you could have been presterilising they could have been presterilising

Negation

Simple form	V-ing form
I could not presterilise you could not presterilise he could not presterilise we could not presterilise you could not presterilise they could not presterilise	I could not be presterilising you could not be presterilising he could not be presterilising we could not be presterilising you could not be presterilising they could not be presterilising
Perfect	V-ing perfect
I could not have presterilised you could not have presterilised he could not have presterilised we could not have presterilised you could not have presterilised they could not have presterilised	I could not have been presterilising you could not have been presterilising he could not have been presterilising we could not have been presterilising you could not have been presterilising they could not have been presterilising

Interrogative form

Simple form	V-ing form
could I presterilise? could you presterilise? could he presterilise? could we presterilise? could you presterilise? could they presterilise?	could I be presterilising? could you be presterilising? could he be presterilising? could we be presterilising? could you be presterilising? could they be presterilising?
Perfect	V-ing perfect
could I have presterilised? could you have presterilised? could he have presterilised? could we have presterilised? could you have presterilised? could they have presterilised?	could I have been presterilising? could you have been presterilising? could he have been presterilising? could we have been presterilising? could you have been presterilising? could they have been presterilising?

Interro-negative form

Simple form	V-ing form
could I not presterilise? could you not presterilise? could he not presterilise? could we not presterilise? could you not presterilise? could they not presterilise?	could I not be presterilising? could you not be presterilising? could he not be presterilising? could we not be presterilising? could you not be presterilising? could they not be presterilising?
Perfect	V-ing perfect
could I not have presterilised? could you not have presterilised? could he not have presterilised? could we not have presterilised? could you not have presterilised? could they not have presterilised?	could I not have been presterilising? could you not have been presterilising? could he not have been presterilising? could we not have been presterilising? could you not have been presterilising? could they not have been presterilising?