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 couldn't endorse you couldn't endorse he couldn't endorse we couldn't endorse you couldn't endorse they couldn't endorse	I couldn't be endorsing you couldn't be endorsing he couldn't be endorsing we couldn't be endorsing you couldn't be endorsing they couldn't be endorsing
Perfect	V-ing perfect
I couldn't have endorsed you couldn't have endorsed he couldn't have endorsed we couldn't have endorsed you couldn't have endorsed they couldn't have endorsed	I couldn't have been endorsing you couldn't have been endorsing he couldn't have been endorsing we couldn't have been endorsing you couldn't have been endorsing they couldn't 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
couldn't I endorse? couldn't you endorse? couldn't he endorse? couldn't we endorse? couldn't you endorse? couldn't they endorse?	couldn't I be endorsing? couldn't you be endorsing? couldn't he be endorsing? couldn't we be endorsing? couldn't you be endorsing? couldn't they be endorsing?
Perfect	V-ing perfect
couldn't I have endorsed? couldn't you have endorsed? couldn't he have endorsed? couldn't we have endorsed? couldn't you have endorsed? couldn't they have endorsed?	couldn't I have been endorsing? couldn't you have been endorsing? couldn't he have been endorsing? couldn't we have been endorsing? couldn't you have been endorsing? couldn't they have been endorsing?