English verb conjugation
MUST DESTABILISE

Regular verb: destabilise - destabilised - destabilised

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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