English verb conjugation
COULD ENDORSE

Regular verb: endorse - endorsed - endorsed

Affirmation

Simple form	V-ing form
I could endorse you could endorse he could endorse we could endorse you could endorse they could endorse	I could be endorsing you could be endorsing he could be endorsing we could be endorsing you could be endorsing they could be endorsing
Perfect	V-ing perfect
I could have endorsed you could have endorsed he could have endorsed we could have endorsed you could have endorsed they could have endorsed	I could have been endorsing you could have been endorsing he could have been endorsing we could have been endorsing you could have been endorsing they could have been endorsing

Negation

Simple form	V-ing form
I could not endorse you could not endorse he could not endorse we could not endorse you could not endorse they could not endorse	I could not be endorsing you could not be endorsing he could not be endorsing we could not be endorsing you could not be endorsing they could not be endorsing
Perfect	V-ing perfect
I could not have endorsed you could not have endorsed he could not have endorsed we could not have endorsed you could not have endorsed they could not have endorsed	I could not have been endorsing you could not have been endorsing he could not have been endorsing we could not have been endorsing you could not have been endorsing they could not have been endorsing

Interrogative form

Simple form	V-ing form
could I endorse? could you endorse? could he endorse? could we endorse? could you endorse? could they endorse?	could I be endorsing? could you be endorsing? could he be endorsing? could we be endorsing? could you be endorsing? could they be endorsing?
Perfect	V-ing perfect
could I have endorsed? could you have endorsed? could he have endorsed? could we have endorsed? could you have endorsed? could they have endorsed?	could I have been endorsing? could you have been endorsing? could he have been endorsing? could we have been endorsing? could you have been endorsing? could they have been endorsing?

Interro-negative form

Simple form	V-ing form
could I not endorse? could you not endorse? could he not endorse? could we not endorse? could you not endorse? could they not endorse?	could I not be endorsing? could you not be endorsing? could he not be endorsing? could we not be endorsing? could you not be endorsing? could they not be endorsing?
Perfect	V-ing perfect
could I not have endorsed? could you not have endorsed? could he not have endorsed? could we not have endorsed? could you not have endorsed? could they not have endorsed?	could I not have been endorsing? could you not have been endorsing? could he not have been endorsing? could we not have been endorsing? could you not have been endorsing? could they not have been endorsing?