English verb conjugation
COULD NITRIDE

Regular verb: nitride - nitrided - nitrided

Affirmation

Simple form	V-ing form
I could nitride you could nitride she could nitride we could nitride you could nitride they could nitride	I could be nitriding you could be nitriding she could be nitriding we could be nitriding you could be nitriding they could be nitriding
Perfect	V-ing perfect
I could have nitrided you could have nitrided she could have nitrided we could have nitrided you could have nitrided they could have nitrided	I could have been nitriding you could have been nitriding she could have been nitriding we could have been nitriding you could have been nitriding they could have been nitriding

Negation

Simple form	V-ing form
I couldn't nitride you couldn't nitride she couldn't nitride we couldn't nitride you couldn't nitride they couldn't nitride	I couldn't be nitriding you couldn't be nitriding she couldn't be nitriding we couldn't be nitriding you couldn't be nitriding they couldn't be nitriding
Perfect	V-ing perfect
I couldn't have nitrided you couldn't have nitrided she couldn't have nitrided we couldn't have nitrided you couldn't have nitrided they couldn't have nitrided	I couldn't have been nitriding you couldn't have been nitriding she couldn't have been nitriding we couldn't have been nitriding you couldn't have been nitriding they couldn't have been nitriding

Interrogative form

Simple form	V-ing form
could I nitride? could you nitride? could she nitride? could we nitride? could you nitride? could they nitride?	could I be nitriding? could you be nitriding? could she be nitriding? could we be nitriding? could you be nitriding? could they be nitriding?
Perfect	V-ing perfect
could I have nitrided? could you have nitrided? could she have nitrided? could we have nitrided? could you have nitrided? could they have nitrided?	could I have been nitriding? could you have been nitriding? could she have been nitriding? could we have been nitriding? could you have been nitriding? could they have been nitriding?

Interro-negative form

Simple form	V-ing form
couldn't I nitride? couldn't you nitride? couldn't she nitride? couldn't we nitride? couldn't you nitride? couldn't they nitride?	couldn't I be nitriding? couldn't you be nitriding? couldn't she be nitriding? couldn't we be nitriding? couldn't you be nitriding? couldn't they be nitriding?
Perfect	V-ing perfect
couldn't I have nitrided? couldn't you have nitrided? couldn't she have nitrided? couldn't we have nitrided? couldn't you have nitrided? couldn't they have nitrided?	couldn't I have been nitriding? couldn't you have been nitriding? couldn't she have been nitriding? couldn't we have been nitriding? couldn't you have been nitriding? couldn't they have been nitriding?