English verb conjugation
COULD OXIDISE

Regular verb: oxidise - oxidised - oxidised

Affirmation

Simple form	V-ing form
I could oxidise you could oxidise he could oxidise we could oxidise you could oxidise they could oxidise	I could be oxidising you could be oxidising he could be oxidising we could be oxidising you could be oxidising they could be oxidising
Perfect	V-ing perfect
I could have oxidised you could have oxidised he could have oxidised we could have oxidised you could have oxidised they could have oxidised	I could have been oxidising you could have been oxidising he could have been oxidising we could have been oxidising you could have been oxidising they could have been oxidising

Negation

Simple form	V-ing form
I could not oxidise you could not oxidise he could not oxidise we could not oxidise you could not oxidise they could not oxidise	I could not be oxidising you could not be oxidising he could not be oxidising we could not be oxidising you could not be oxidising they could not be oxidising
Perfect	V-ing perfect
I could not have oxidised you could not have oxidised he could not have oxidised we could not have oxidised you could not have oxidised they could not have oxidised	I could not have been oxidising you could not have been oxidising he could not have been oxidising we could not have been oxidising you could not have been oxidising they could not have been oxidising

Interrogative form

Simple form	V-ing form
could I oxidise? could you oxidise? could he oxidise? could we oxidise? could you oxidise? could they oxidise?	could I be oxidising? could you be oxidising? could he be oxidising? could we be oxidising? could you be oxidising? could they be oxidising?
Perfect	V-ing perfect
could I have oxidised? could you have oxidised? could he have oxidised? could we have oxidised? could you have oxidised? could they have oxidised?	could I have been oxidising? could you have been oxidising? could he have been oxidising? could we have been oxidising? could you have been oxidising? could they have been oxidising?

Interro-negative form

Simple form	V-ing form
could I not oxidise? could you not oxidise? could he not oxidise? could we not oxidise? could you not oxidise? could they not oxidise?	could I not be oxidising? could you not be oxidising? could he not be oxidising? could we not be oxidising? could you not be oxidising? could they not be oxidising?
Perfect	V-ing perfect
could I not have oxidised? could you not have oxidised? could he not have oxidised? could we not have oxidised? could you not have oxidised? could they not have oxidised?	could I not have been oxidising? could you not have been oxidising? could he not have been oxidising? could we not have been oxidising? could you not have been oxidising? could they not have been oxidising?