English verb conjugation
COULD PREFERTILISE

Regular verb: prefertilise - prefertilised - prefertilised

Affirmation

Simple form	V-ing form
I could prefertilise you could prefertilise he could prefertilise we could prefertilise you could prefertilise they could prefertilise	I could be prefertilising you could be prefertilising he could be prefertilising we could be prefertilising you could be prefertilising they could be prefertilising
Perfect	V-ing perfect
I could have prefertilised you could have prefertilised he could have prefertilised we could have prefertilised you could have prefertilised they could have prefertilised	I could have been prefertilising you could have been prefertilising he could have been prefertilising we could have been prefertilising you could have been prefertilising they could have been prefertilising

Negation

Simple form	V-ing form
I couldn't prefertilise you couldn't prefertilise he couldn't prefertilise we couldn't prefertilise you couldn't prefertilise they couldn't prefertilise	I couldn't be prefertilising you couldn't be prefertilising he couldn't be prefertilising we couldn't be prefertilising you couldn't be prefertilising they couldn't be prefertilising
Perfect	V-ing perfect
I couldn't have prefertilised you couldn't have prefertilised he couldn't have prefertilised we couldn't have prefertilised you couldn't have prefertilised they couldn't have prefertilised	I couldn't have been prefertilising you couldn't have been prefertilising he couldn't have been prefertilising we couldn't have been prefertilising you couldn't have been prefertilising they couldn't have been prefertilising

Interrogative form

Simple form	V-ing form
could I prefertilise? could you prefertilise? could he prefertilise? could we prefertilise? could you prefertilise? could they prefertilise?	could I be prefertilising? could you be prefertilising? could he be prefertilising? could we be prefertilising? could you be prefertilising? could they be prefertilising?
Perfect	V-ing perfect
could I have prefertilised? could you have prefertilised? could he have prefertilised? could we have prefertilised? could you have prefertilised? could they have prefertilised?	could I have been prefertilising? could you have been prefertilising? could he have been prefertilising? could we have been prefertilising? could you have been prefertilising? could they have been prefertilising?

Interro-negative form

Simple form	V-ing form
couldn't I prefertilise? couldn't you prefertilise? couldn't he prefertilise? couldn't we prefertilise? couldn't you prefertilise? couldn't they prefertilise?	couldn't I be prefertilising? couldn't you be prefertilising? couldn't he be prefertilising? couldn't we be prefertilising? couldn't you be prefertilising? couldn't they be prefertilising?
Perfect	V-ing perfect
couldn't I have prefertilised? couldn't you have prefertilised? couldn't he have prefertilised? couldn't we have prefertilised? couldn't you have prefertilised? couldn't they have prefertilised?	couldn't I have been prefertilising? couldn't you have been prefertilising? couldn't he have been prefertilising? couldn't we have been prefertilising? couldn't you have been prefertilising? couldn't they have been prefertilising?