English verb conjugation
CAN ENDORSE

Regular verb: endorse - endorsed - endorsed

Affirmation

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

Negation

Simple form	V-ing form
I can't endorse you can't endorse he can't endorse we can't endorse you can't endorse they can't endorse	I can't be endorsing you can't be endorsing he can't be endorsing we can't be endorsing you can't be endorsing they can't be endorsing
Perfect	V-ing perfect
I can't have endorsed you can't have endorsed he can't have endorsed we can't have endorsed you can't have endorsed they can't have endorsed	I can't have been endorsing you can't have been endorsing he can't have been endorsing we can't have been endorsing you can't have been endorsing they can't have been endorsing

Interrogative form

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

Interro-negative form

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