English verb conjugation
COULD UNMASK

Regular verb: unmask - unmasked - unmasked

Affirmation

Simple form	V-ing form
I could unmask you could unmask she could unmask we could unmask you could unmask they could unmask	I could be unmasking you could be unmasking she could be unmasking we could be unmasking you could be unmasking they could be unmasking
Perfect	V-ing perfect
I could have unmasked you could have unmasked she could have unmasked we could have unmasked you could have unmasked they could have unmasked	I could have been unmasking you could have been unmasking she could have been unmasking we could have been unmasking you could have been unmasking they could have been unmasking

Negation

Simple form	V-ing form
I could not unmask you could not unmask she could not unmask we could not unmask you could not unmask they could not unmask	I could not be unmasking you could not be unmasking she could not be unmasking we could not be unmasking you could not be unmasking they could not be unmasking
Perfect	V-ing perfect
I could not have unmasked you could not have unmasked she could not have unmasked we could not have unmasked you could not have unmasked they could not have unmasked	I could not have been unmasking you could not have been unmasking she could not have been unmasking we could not have been unmasking you could not have been unmasking they could not have been unmasking

Interrogative form

Simple form	V-ing form
could I unmask? could you unmask? could she unmask? could we unmask? could you unmask? could they unmask?	could I be unmasking? could you be unmasking? could she be unmasking? could we be unmasking? could you be unmasking? could they be unmasking?
Perfect	V-ing perfect
could I have unmasked? could you have unmasked? could she have unmasked? could we have unmasked? could you have unmasked? could they have unmasked?	could I have been unmasking? could you have been unmasking? could she have been unmasking? could we have been unmasking? could you have been unmasking? could they have been unmasking?

Interro-negative form

Simple form	V-ing form
could I not unmask? could you not unmask? could she not unmask? could we not unmask? could you not unmask? could they not unmask?	could I not be unmasking? could you not be unmasking? could she not be unmasking? could we not be unmasking? could you not be unmasking? could they not be unmasking?
Perfect	V-ing perfect
could I not have unmasked? could you not have unmasked? could she not have unmasked? could we not have unmasked? could you not have unmasked? could they not have unmasked?	could I not have been unmasking? could you not have been unmasking? could she not have been unmasking? could we not have been unmasking? could you not have been unmasking? could they not have been unmasking?