English verb conjugation
COULD FOSSILISE

Regular verb: fossilise - fossilised - fossilised

Affirmation

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

Negation

Simple form	V-ing form
I could not fossilise you could not fossilise he could not fossilise we could not fossilise you could not fossilise they could not fossilise	I could not be fossilising you could not be fossilising he could not be fossilising we could not be fossilising you could not be fossilising they could not be fossilising
Perfect	V-ing perfect
I could not have fossilised you could not have fossilised he could not have fossilised we could not have fossilised you could not have fossilised they could not have fossilised	I could not have been fossilising you could not have been fossilising he could not have been fossilising we could not have been fossilising you could not have been fossilising they could not have been fossilising

Interrogative form

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

Interro-negative form

Simple form	V-ing form
could I not fossilise? could you not fossilise? could he not fossilise? could we not fossilise? could you not fossilise? could they not fossilise?	could I not be fossilising? could you not be fossilising? could he not be fossilising? could we not be fossilising? could you not be fossilising? could they not be fossilising?
Perfect	V-ing perfect
could I not have fossilised? could you not have fossilised? could he not have fossilised? could we not have fossilised? could you not have fossilised? could they not have fossilised?	could I not have been fossilising? could you not have been fossilising? could he not have been fossilising? could we not have been fossilising? could you not have been fossilising? could they not have been fossilising?