English verb conjugation
COULD DESTABILISE

Regular verb: destabilise - destabilised - destabilised

Affirmation

Simple form	V-ing form
I could destabilise you could destabilise she could destabilise we could destabilise you could destabilise they could destabilise	I could be destabilising you could be destabilising she could be destabilising we could be destabilising you could be destabilising they could be destabilising
Perfect	V-ing perfect
I could have destabilised you could have destabilised she could have destabilised we could have destabilised you could have destabilised they could have destabilised	I could have been destabilising you could have been destabilising she could have been destabilising we could have been destabilising you could have been destabilising they could have been destabilising

Negation

Simple form	V-ing form
I could not destabilise you could not destabilise she could not destabilise we could not destabilise you could not destabilise they could not destabilise	I could not be destabilising you could not be destabilising she could not be destabilising we could not be destabilising you could not be destabilising they could not be destabilising
Perfect	V-ing perfect
I could not have destabilised you could not have destabilised she could not have destabilised we could not have destabilised you could not have destabilised they could not have destabilised	I could not have been destabilising you could not have been destabilising she could not have been destabilising we could not have been destabilising you could not have been destabilising they could not have been destabilising

Interrogative form

Simple form	V-ing form
could I destabilise? could you destabilise? could she destabilise? could we destabilise? could you destabilise? could they destabilise?	could I be destabilising? could you be destabilising? could she be destabilising? could we be destabilising? could you be destabilising? could they be destabilising?
Perfect	V-ing perfect
could I have destabilised? could you have destabilised? could she have destabilised? could we have destabilised? could you have destabilised? could they have destabilised?	could I have been destabilising? could you have been destabilising? could she have been destabilising? could we have been destabilising? could you have been destabilising? could they have been destabilising?

Interro-negative form

Simple form	V-ing form
could I not destabilise? could you not destabilise? could she not destabilise? could we not destabilise? could you not destabilise? could they not destabilise?	could I not be destabilising? could you not be destabilising? could she not be destabilising? could we not be destabilising? could you not be destabilising? could they not be destabilising?
Perfect	V-ing perfect
could I not have destabilised? could you not have destabilised? could she not have destabilised? could we not have destabilised? could you not have destabilised? could they not have destabilised?	could I not have been destabilising? could you not have been destabilising? could she not have been destabilising? could we not have been destabilising? could you not have been destabilising? could they not have been destabilising?