English verb conjugation
COULD DECARBURISE

Regular verb: decarburise - decarburised - decarburised

Affirmation

Simple form	V-ing form
I could decarburise you could decarburise he could decarburise we could decarburise you could decarburise they could decarburise	I could be decarburising you could be decarburising he could be decarburising we could be decarburising you could be decarburising they could be decarburising
Perfect	V-ing perfect
I could have decarburised you could have decarburised he could have decarburised we could have decarburised you could have decarburised they could have decarburised	I could have been decarburising you could have been decarburising he could have been decarburising we could have been decarburising you could have been decarburising they could have been decarburising

Negation

Simple form	V-ing form
I couldn't decarburise you couldn't decarburise he couldn't decarburise we couldn't decarburise you couldn't decarburise they couldn't decarburise	I couldn't be decarburising you couldn't be decarburising he couldn't be decarburising we couldn't be decarburising you couldn't be decarburising they couldn't be decarburising
Perfect	V-ing perfect
I couldn't have decarburised you couldn't have decarburised he couldn't have decarburised we couldn't have decarburised you couldn't have decarburised they couldn't have decarburised	I couldn't have been decarburising you couldn't have been decarburising he couldn't have been decarburising we couldn't have been decarburising you couldn't have been decarburising they couldn't have been decarburising

Interrogative form

Simple form	V-ing form
could I decarburise? could you decarburise? could he decarburise? could we decarburise? could you decarburise? could they decarburise?	could I be decarburising? could you be decarburising? could he be decarburising? could we be decarburising? could you be decarburising? could they be decarburising?
Perfect	V-ing perfect
could I have decarburised? could you have decarburised? could he have decarburised? could we have decarburised? could you have decarburised? could they have decarburised?	could I have been decarburising? could you have been decarburising? could he have been decarburising? could we have been decarburising? could you have been decarburising? could they have been decarburising?

Interro-negative form

Simple form	V-ing form
couldn't I decarburise? couldn't you decarburise? couldn't he decarburise? couldn't we decarburise? couldn't you decarburise? couldn't they decarburise?	couldn't I be decarburising? couldn't you be decarburising? couldn't he be decarburising? couldn't we be decarburising? couldn't you be decarburising? couldn't they be decarburising?
Perfect	V-ing perfect
couldn't I have decarburised? couldn't you have decarburised? couldn't he have decarburised? couldn't we have decarburised? couldn't you have decarburised? couldn't they have decarburised?	couldn't I have been decarburising? couldn't you have been decarburising? couldn't he have been decarburising? couldn't we have been decarburising? couldn't you have been decarburising? couldn't they have been decarburising?