English verb conjugation
COULD DECARBURISE

Regular verb: decarburise - decarburised - decarburised

Affirmation

Simple form	V-ing form
I could decarburise you could decarburise she could decarburise we could decarburise you could decarburise they could decarburise	I could be decarburising you could be decarburising she 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 she 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 she 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 she 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 she 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 she 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 she 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 she decarburise? could we decarburise? could you decarburise? could they decarburise?	could I be decarburising? could you be decarburising? could she 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 she 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 she 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 she 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 she 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 she 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 she have been decarburising? couldn't we have been decarburising? couldn't you have been decarburising? couldn't they have been decarburising?