should embitter
Regular verb: embitter - embittered- embittered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should embitter
you should embitter
she should embitter
we should embitter
you should embitter
they should embitter 	I should be embittering
you should be embittering
she should be embittering
we should be embittering
you should be embittering
they should be embittering	I should have embittered
you should have embittered
she should have embittered
we should have embittered
you should have embittered
they should have embittered	I should have been embittering
you should have been embittering
she should have been embittering
we should have been embittering
you should have been embittering
they should have been embittering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not embitter
you should not embitter
she should not embitter
we should not embitter
you should not embitter
they should not embitter 	I should not be embittering
you should not be embittering
she should not be embittering
we should not be embittering
you should not be embittering
they should not be embittering	I should not have embittered
you should not have embittered
she should not have embittered
we should not have embittered
you should not have embittered
they should not have embittered	I should not have been embittering
you should not have been embittering
she should not have been embittering
we should not have been embittering
you should not have been embittering
they should not have been embittering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I embitter?
should you embitter?
should she embitter?
should we embitter?
should you embitter?
should they embitter? 	should I be embittering?
should you be embittering?
should she be embittering?
should we be embittering?
should you be embittering?
should they be embittering? 	should I have embittered?
should you have embittered?
should she have embittered?
should we have embittered?
should you have embittered?
should they have embittered? 	should I have been embittering?
should you have been embittering?
should she have been embittering?
should we have been embittering?
should you have been embittering?
should they have been embittering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not embitter?
should you not embitter?
should she not embitter?
should we not embitter?
should you not embitter?
should they not embitter? 	should I not be embittering?
should you not be embittering?
should she not be embittering?
should we not be embittering?
should you not be embittering?
should they not be embittering? 	should I not have embittered?
should you not have embittered?
should she not have embittered?
should we not have embittered?
should you not have embittered?
should they not have embittered? 	should I not have been embittering?
should you not have been embittering?
should she not have been embittering?
should we not have been embittering?
should you not have been embittering?
should they not have been embittering?