English verb conjugation
COULD DECARBONISE

Regular verb: decarbonise - decarbonised - decarbonised

Affirmation

Simple form	V-ing form
I could decarbonise you could decarbonise he could decarbonise we could decarbonise you could decarbonise they could decarbonise	I could be decarbonising you could be decarbonising he could be decarbonising we could be decarbonising you could be decarbonising they could be decarbonising
Perfect	V-ing perfect
I could have decarbonised you could have decarbonised he could have decarbonised we could have decarbonised you could have decarbonised they could have decarbonised	I could have been decarbonising you could have been decarbonising he could have been decarbonising we could have been decarbonising you could have been decarbonising they could have been decarbonising

Negation

Simple form	V-ing form
I couldn't decarbonise you couldn't decarbonise he couldn't decarbonise we couldn't decarbonise you couldn't decarbonise they couldn't decarbonise	I couldn't be decarbonising you couldn't be decarbonising he couldn't be decarbonising we couldn't be decarbonising you couldn't be decarbonising they couldn't be decarbonising
Perfect	V-ing perfect
I couldn't have decarbonised you couldn't have decarbonised he couldn't have decarbonised we couldn't have decarbonised you couldn't have decarbonised they couldn't have decarbonised	I couldn't have been decarbonising you couldn't have been decarbonising he couldn't have been decarbonising we couldn't have been decarbonising you couldn't have been decarbonising they couldn't have been decarbonising

Interrogative form

Simple form	V-ing form
could I decarbonise? could you decarbonise? could he decarbonise? could we decarbonise? could you decarbonise? could they decarbonise?	could I be decarbonising? could you be decarbonising? could he be decarbonising? could we be decarbonising? could you be decarbonising? could they be decarbonising?
Perfect	V-ing perfect
could I have decarbonised? could you have decarbonised? could he have decarbonised? could we have decarbonised? could you have decarbonised? could they have decarbonised?	could I have been decarbonising? could you have been decarbonising? could he have been decarbonising? could we have been decarbonising? could you have been decarbonising? could they have been decarbonising?

Interro-negative form

Simple form	V-ing form
couldn't I decarbonise? couldn't you decarbonise? couldn't he decarbonise? couldn't we decarbonise? couldn't you decarbonise? couldn't they decarbonise?	couldn't I be decarbonising? couldn't you be decarbonising? couldn't he be decarbonising? couldn't we be decarbonising? couldn't you be decarbonising? couldn't they be decarbonising?
Perfect	V-ing perfect
couldn't I have decarbonised? couldn't you have decarbonised? couldn't he have decarbonised? couldn't we have decarbonised? couldn't you have decarbonised? couldn't they have decarbonised?	couldn't I have been decarbonising? couldn't you have been decarbonising? couldn't he have been decarbonising? couldn't we have been decarbonising? couldn't you have been decarbonising? couldn't they have been decarbonising?