English verb conjugation
COULD OVERFERTILISE

Regular verb: overfertilise - overfertilised - overfertilised

Affirmation

Simple form	V-ing form
I could overfertilise you could overfertilise he could overfertilise we could overfertilise you could overfertilise they could overfertilise	I could be overfertilising you could be overfertilising he could be overfertilising we could be overfertilising you could be overfertilising they could be overfertilising
Perfect	V-ing perfect
I could have overfertilised you could have overfertilised he could have overfertilised we could have overfertilised you could have overfertilised they could have overfertilised	I could have been overfertilising you could have been overfertilising he could have been overfertilising we could have been overfertilising you could have been overfertilising they could have been overfertilising

Negation

Simple form	V-ing form
I could not overfertilise you could not overfertilise he could not overfertilise we could not overfertilise you could not overfertilise they could not overfertilise	I could not be overfertilising you could not be overfertilising he could not be overfertilising we could not be overfertilising you could not be overfertilising they could not be overfertilising
Perfect	V-ing perfect
I could not have overfertilised you could not have overfertilised he could not have overfertilised we could not have overfertilised you could not have overfertilised they could not have overfertilised	I could not have been overfertilising you could not have been overfertilising he could not have been overfertilising we could not have been overfertilising you could not have been overfertilising they could not have been overfertilising

Interrogative form

Simple form	V-ing form
could I overfertilise? could you overfertilise? could he overfertilise? could we overfertilise? could you overfertilise? could they overfertilise?	could I be overfertilising? could you be overfertilising? could he be overfertilising? could we be overfertilising? could you be overfertilising? could they be overfertilising?
Perfect	V-ing perfect
could I have overfertilised? could you have overfertilised? could he have overfertilised? could we have overfertilised? could you have overfertilised? could they have overfertilised?	could I have been overfertilising? could you have been overfertilising? could he have been overfertilising? could we have been overfertilising? could you have been overfertilising? could they have been overfertilising?

Interro-negative form

Simple form	V-ing form
could I not overfertilise? could you not overfertilise? could he not overfertilise? could we not overfertilise? could you not overfertilise? could they not overfertilise?	could I not be overfertilising? could you not be overfertilising? could he not be overfertilising? could we not be overfertilising? could you not be overfertilising? could they not be overfertilising?
Perfect	V-ing perfect
could I not have overfertilised? could you not have overfertilised? could he not have overfertilised? could we not have overfertilised? could you not have overfertilised? could they not have overfertilised?	could I not have been overfertilising? could you not have been overfertilising? could he not have been overfertilising? could we not have been overfertilising? could you not have been overfertilising? could they not have been overfertilising?