English verb conjugation
COULD SUFFOCATE

Regular verb: suffocate - suffocated - suffocated

Affirmation

Simple form	V-ing form
I could suffocate you could suffocate she could suffocate we could suffocate you could suffocate they could suffocate	I could be suffocating you could be suffocating she could be suffocating we could be suffocating you could be suffocating they could be suffocating
Perfect	V-ing perfect
I could have suffocated you could have suffocated she could have suffocated we could have suffocated you could have suffocated they could have suffocated	I could have been suffocating you could have been suffocating she could have been suffocating we could have been suffocating you could have been suffocating they could have been suffocating

Negation

Simple form	V-ing form
I could not suffocate you could not suffocate she could not suffocate we could not suffocate you could not suffocate they could not suffocate	I could not be suffocating you could not be suffocating she could not be suffocating we could not be suffocating you could not be suffocating they could not be suffocating
Perfect	V-ing perfect
I could not have suffocated you could not have suffocated she could not have suffocated we could not have suffocated you could not have suffocated they could not have suffocated	I could not have been suffocating you could not have been suffocating she could not have been suffocating we could not have been suffocating you could not have been suffocating they could not have been suffocating

Interrogative form

Simple form	V-ing form
could I suffocate? could you suffocate? could she suffocate? could we suffocate? could you suffocate? could they suffocate?	could I be suffocating? could you be suffocating? could she be suffocating? could we be suffocating? could you be suffocating? could they be suffocating?
Perfect	V-ing perfect
could I have suffocated? could you have suffocated? could she have suffocated? could we have suffocated? could you have suffocated? could they have suffocated?	could I have been suffocating? could you have been suffocating? could she have been suffocating? could we have been suffocating? could you have been suffocating? could they have been suffocating?

Interro-negative form

Simple form	V-ing form
could I not suffocate? could you not suffocate? could she not suffocate? could we not suffocate? could you not suffocate? could they not suffocate?	could I not be suffocating? could you not be suffocating? could she not be suffocating? could we not be suffocating? could you not be suffocating? could they not be suffocating?
Perfect	V-ing perfect
could I not have suffocated? could you not have suffocated? could she not have suffocated? could we not have suffocated? could you not have suffocated? could they not have suffocated?	could I not have been suffocating? could you not have been suffocating? could she not have been suffocating? could we not have been suffocating? could you not have been suffocating? could they not have been suffocating?