male gender | Modal : no | may | might | can | could | shall | should | will | would | must | ought to
English verb conjugation COULD ENDEAVOR
Regular verb: endeavor - endeavored - endeavored
Affirmation
Simple form
I could endeavoryou could endeavor
she could endeavor
we could endeavor
you could endeavor
they could endeavor
V-ing form
I could be endeavoringyou could be endeavoring
she could be endeavoring
we could be endeavoring
you could be endeavoring
they could be endeavoring
Perfect
I could have endeavoredyou could have endeavored
she could have endeavored
we could have endeavored
you could have endeavored
they could have endeavored
V-ing perfect
I could have been endeavoringyou could have been endeavoring
she could have been endeavoring
we could have been endeavoring
you could have been endeavoring
they could have been endeavoring
Negation
Simple form
I couldn't endeavoryou couldn't endeavor
she couldn't endeavor
we couldn't endeavor
you couldn't endeavor
they couldn't endeavor
V-ing form
I couldn't be endeavoringyou couldn't be endeavoring
she couldn't be endeavoring
we couldn't be endeavoring
you couldn't be endeavoring
they couldn't be endeavoring
Perfect
I couldn't have endeavoredyou couldn't have endeavored
she couldn't have endeavored
we couldn't have endeavored
you couldn't have endeavored
they couldn't have endeavored
V-ing perfect
I couldn't have been endeavoringyou couldn't have been endeavoring
she couldn't have been endeavoring
we couldn't have been endeavoring
you couldn't have been endeavoring
they couldn't have been endeavoring
Interrogative form
Simple form
could I endeavor?could you endeavor?
could she endeavor?
could we endeavor?
could you endeavor?
could they endeavor?
V-ing form
could I be endeavoring?could you be endeavoring?
could she be endeavoring?
could we be endeavoring?
could you be endeavoring?
could they be endeavoring?
Perfect
could I have endeavored?could you have endeavored?
could she have endeavored?
could we have endeavored?
could you have endeavored?
could they have endeavored?
V-ing perfect
could I have been endeavoring?could you have been endeavoring?
could she have been endeavoring?
could we have been endeavoring?
could you have been endeavoring?
could they have been endeavoring?
Interro-negative form
Simple form
couldn't I endeavor?couldn't you endeavor?
couldn't she endeavor?
couldn't we endeavor?
couldn't you endeavor?
couldn't they endeavor?
V-ing form
couldn't I be endeavoring?couldn't you be endeavoring?
couldn't she be endeavoring?
couldn't we be endeavoring?
couldn't you be endeavoring?
couldn't they be endeavoring?
Perfect
couldn't I have endeavored?couldn't you have endeavored?
couldn't she have endeavored?
couldn't we have endeavored?
couldn't you have endeavored?
couldn't they have endeavored?
V-ing perfect
couldn't I have been endeavoring?couldn't you have been endeavoring?
couldn't she have been endeavoring?
couldn't we have been endeavoring?
couldn't you have been endeavoring?
couldn't they have been endeavoring?