English verb conjugation
MUST FOSSILISE

Regular verb: fossilise - fossilised - fossilised

Affirmation

Simple form	V-ing form
I must fossilise you must fossilise he must fossilise we must fossilise you must fossilise they must fossilise	I must be fossilising you must be fossilising he must be fossilising we must be fossilising you must be fossilising they must be fossilising
Perfect	V-ing perfect
I must have fossilised you must have fossilised he must have fossilised we must have fossilised you must have fossilised they must have fossilised	I must have been fossilising you must have been fossilising he must have been fossilising we must have been fossilising you must have been fossilising they must have been fossilising

Negation

Simple form	V-ing form
I mustn't fossilise you mustn't fossilise he mustn't fossilise we mustn't fossilise you mustn't fossilise they mustn't fossilise	I mustn't be fossilising you mustn't be fossilising he mustn't be fossilising we mustn't be fossilising you mustn't be fossilising they mustn't be fossilising
Perfect	V-ing perfect
I mustn't have fossilised you mustn't have fossilised he mustn't have fossilised we mustn't have fossilised you mustn't have fossilised they mustn't have fossilised	I mustn't have been fossilising you mustn't have been fossilising he mustn't have been fossilising we mustn't have been fossilising you mustn't have been fossilising they mustn't have been fossilising

Interrogative form

Simple form	V-ing form
must I fossilise? must you fossilise? must he fossilise? must we fossilise? must you fossilise? must they fossilise?	must I be fossilising? must you be fossilising? must he be fossilising? must we be fossilising? must you be fossilising? must they be fossilising?
Perfect	V-ing perfect
must I have fossilised? must you have fossilised? must he have fossilised? must we have fossilised? must you have fossilised? must they have fossilised?	must I have been fossilising? must you have been fossilising? must he have been fossilising? must we have been fossilising? must you have been fossilising? must they have been fossilising?

Interro-negative form

Simple form	V-ing form
mustn't I fossilise? mustn't you fossilise? mustn't he fossilise? mustn't we fossilise? mustn't you fossilise? mustn't they fossilise?	mustn't I be fossilising? mustn't you be fossilising? mustn't he be fossilising? mustn't we be fossilising? mustn't you be fossilising? mustn't they be fossilising?
Perfect	V-ing perfect
mustn't I have fossilised? mustn't you have fossilised? mustn't he have fossilised? mustn't we have fossilised? mustn't you have fossilised? mustn't they have fossilised?	mustn't I have been fossilising? mustn't you have been fossilising? mustn't he have been fossilising? mustn't we have been fossilising? mustn't you have been fossilising? mustn't they have been fossilising?