female gender | Modal : no | may | might | can | could | shall | should | will | would | must | ought to
English verb conjugation COULD CONTRIBUTE
Regular verb: contribute - contributed - contributed
Affirmation
Simple form
I could contributeyou could contribute
he could contribute
we could contribute
you could contribute
they could contribute
V-ing form
I could be contributingyou could be contributing
he could be contributing
we could be contributing
you could be contributing
they could be contributing
Perfect
I could have contributedyou could have contributed
he could have contributed
we could have contributed
you could have contributed
they could have contributed
V-ing perfect
I could have been contributingyou could have been contributing
he could have been contributing
we could have been contributing
you could have been contributing
they could have been contributing
Negation
Simple form
I could not contributeyou could not contribute
he could not contribute
we could not contribute
you could not contribute
they could not contribute
V-ing form
I could not be contributingyou could not be contributing
he could not be contributing
we could not be contributing
you could not be contributing
they could not be contributing
Perfect
I could not have contributedyou could not have contributed
he could not have contributed
we could not have contributed
you could not have contributed
they could not have contributed
V-ing perfect
I could not have been contributingyou could not have been contributing
he could not have been contributing
we could not have been contributing
you could not have been contributing
they could not have been contributing
Interrogative form
Simple form
could I contribute?could you contribute?
could he contribute?
could we contribute?
could you contribute?
could they contribute?
V-ing form
could I be contributing?could you be contributing?
could he be contributing?
could we be contributing?
could you be contributing?
could they be contributing?
Perfect
could I have contributed?could you have contributed?
could he have contributed?
could we have contributed?
could you have contributed?
could they have contributed?
V-ing perfect
could I have been contributing?could you have been contributing?
could he have been contributing?
could we have been contributing?
could you have been contributing?
could they have been contributing?
Interro-negative form
Simple form
could I not contribute?could you not contribute?
could he not contribute?
could we not contribute?
could you not contribute?
could they not contribute?
V-ing form
could I not be contributing?could you not be contributing?
could he not be contributing?
could we not be contributing?
could you not be contributing?
could they not be contributing?
Perfect
could I not have contributed?could you not have contributed?
could he not have contributed?
could we not have contributed?
could you not have contributed?
could they not have contributed?
V-ing perfect
could I not have been contributing?could you not have been contributing?
could he not have been contributing?
could we not have been contributing?
could you not have been contributing?
could they not have been contributing?