English verb conjugation
COULD DESULFERISE

Regular verb: desulferise - desulferised - desulferised

Affirmation

Simple form	V-ing form
I could desulferise you could desulferise he could desulferise we could desulferise you could desulferise they could desulferise	I could be desulferising you could be desulferising he could be desulferising we could be desulferising you could be desulferising they could be desulferising
Perfect	V-ing perfect
I could have desulferised you could have desulferised he could have desulferised we could have desulferised you could have desulferised they could have desulferised	I could have been desulferising you could have been desulferising he could have been desulferising we could have been desulferising you could have been desulferising they could have been desulferising

Negation

Simple form	V-ing form
I couldn't desulferise you couldn't desulferise he couldn't desulferise we couldn't desulferise you couldn't desulferise they couldn't desulferise	I couldn't be desulferising you couldn't be desulferising he couldn't be desulferising we couldn't be desulferising you couldn't be desulferising they couldn't be desulferising
Perfect	V-ing perfect
I couldn't have desulferised you couldn't have desulferised he couldn't have desulferised we couldn't have desulferised you couldn't have desulferised they couldn't have desulferised	I couldn't have been desulferising you couldn't have been desulferising he couldn't have been desulferising we couldn't have been desulferising you couldn't have been desulferising they couldn't have been desulferising

Interrogative form

Simple form	V-ing form
could I desulferise? could you desulferise? could he desulferise? could we desulferise? could you desulferise? could they desulferise?	could I be desulferising? could you be desulferising? could he be desulferising? could we be desulferising? could you be desulferising? could they be desulferising?
Perfect	V-ing perfect
could I have desulferised? could you have desulferised? could he have desulferised? could we have desulferised? could you have desulferised? could they have desulferised?	could I have been desulferising? could you have been desulferising? could he have been desulferising? could we have been desulferising? could you have been desulferising? could they have been desulferising?

Interro-negative form

Simple form	V-ing form
couldn't I desulferise? couldn't you desulferise? couldn't he desulferise? couldn't we desulferise? couldn't you desulferise? couldn't they desulferise?	couldn't I be desulferising? couldn't you be desulferising? couldn't he be desulferising? couldn't we be desulferising? couldn't you be desulferising? couldn't they be desulferising?
Perfect	V-ing perfect
couldn't I have desulferised? couldn't you have desulferised? couldn't he have desulferised? couldn't we have desulferised? couldn't you have desulferised? couldn't they have desulferised?	couldn't I have been desulferising? couldn't you have been desulferising? couldn't he have been desulferising? couldn't we have been desulferising? couldn't you have been desulferising? couldn't they have been desulferising?