English verb conjugation
COULD SUFFER

Regular verb: suffer - suffered - suffered

Affirmation

Simple form	V-ing form
I could suffer you could suffer she could suffer we could suffer you could suffer they could suffer	I could be suffering you could be suffering she could be suffering we could be suffering you could be suffering they could be suffering
Perfect	V-ing perfect
I could have suffered you could have suffered she could have suffered we could have suffered you could have suffered they could have suffered	I could have been suffering you could have been suffering she could have been suffering we could have been suffering you could have been suffering they could have been suffering

Negation

Simple form	V-ing form
I could not suffer you could not suffer she could not suffer we could not suffer you could not suffer they could not suffer	I could not be suffering you could not be suffering she could not be suffering we could not be suffering you could not be suffering they could not be suffering
Perfect	V-ing perfect
I could not have suffered you could not have suffered she could not have suffered we could not have suffered you could not have suffered they could not have suffered	I could not have been suffering you could not have been suffering she could not have been suffering we could not have been suffering you could not have been suffering they could not have been suffering

Interrogative form

Simple form	V-ing form
could I suffer? could you suffer? could she suffer? could we suffer? could you suffer? could they suffer?	could I be suffering? could you be suffering? could she be suffering? could we be suffering? could you be suffering? could they be suffering?
Perfect	V-ing perfect
could I have suffered? could you have suffered? could she have suffered? could we have suffered? could you have suffered? could they have suffered?	could I have been suffering? could you have been suffering? could she have been suffering? could we have been suffering? could you have been suffering? could they have been suffering?

Interro-negative form

Simple form	V-ing form
could I not suffer? could you not suffer? could she not suffer? could we not suffer? could you not suffer? could they not suffer?	could I not be suffering? could you not be suffering? could she not be suffering? could we not be suffering? could you not be suffering? could they not be suffering?
Perfect	V-ing perfect
could I not have suffered? could you not have suffered? could she not have suffered? could we not have suffered? could you not have suffered? could they not have suffered?	could I not have been suffering? could you not have been suffering? could she not have been suffering? could we not have been suffering? could you not have been suffering? could they not have been suffering?