can endorse
Regular verb: endorse - endorsed- endorsed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can endorse
you can endorse
she can endorse
we can endorse
you can endorse
they can endorse 	I can be endorsing
you can be endorsing
she can be endorsing
we can be endorsing
you can be endorsing
they can be endorsing	I can have endorsed
you can have endorsed
she 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
she 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 	Perfect 	V-ing perfect 	
I cannot endorse
you cannot endorse
she cannot endorse
we cannot endorse
you cannot endorse
they cannot endorse 	I cannot be endorsing
you cannot be endorsing
she cannot be endorsing
we cannot be endorsing
you cannot be endorsing
they cannot be endorsing	I cannot have endorsed
you cannot have endorsed
she cannot have endorsed
we cannot have endorsed
you cannot have endorsed
they cannot have endorsed	I cannot have been endorsing
you cannot have been endorsing
she cannot have been endorsing
we cannot have been endorsing
you cannot have been endorsing
they cannot have been endorsing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I endorse?
can you endorse?
can she endorse?
can we endorse?
can you endorse?
can they endorse? 	can I be endorsing?
can you be endorsing?
can she be endorsing?
can we be endorsing?
can you be endorsing?
can they be endorsing? 	can I have endorsed?
can you have endorsed?
can she 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 she 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 	Perfect 	V-ing perfect 	
can I not endorse?
can you not endorse?
can she not endorse?
can we not endorse?
can you not endorse?
can they not endorse? 	can I not be endorsing?
can you not be endorsing?
can she not be endorsing?
can we not be endorsing?
can you not be endorsing?
can they not be endorsing? 	can I not have endorsed?
can you not have endorsed?
can she not have endorsed?
can we not have endorsed?
can you not have endorsed?
can they not have endorsed? 	can I not have been endorsing?
can you not have been endorsing?
can she not have been endorsing?
can we not have been endorsing?
can you not have been endorsing?
can they not have been endorsing?