should gain
Regular verb: gain - gained- gained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should gain
you should gain
he should gain
we should gain
you should gain
they should gain 	I should be gaining
you should be gaining
he should be gaining
we should be gaining
you should be gaining
they should be gaining	I should have gained
you should have gained
he should have gained
we should have gained
you should have gained
they should have gained	I should have been gaining
you should have been gaining
he should have been gaining
we should have been gaining
you should have been gaining
they should have been gaining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not gain
you should not gain
he should not gain
we should not gain
you should not gain
they should not gain 	I should not be gaining
you should not be gaining
he should not be gaining
we should not be gaining
you should not be gaining
they should not be gaining	I should not have gained
you should not have gained
he should not have gained
we should not have gained
you should not have gained
they should not have gained	I should not have been gaining
you should not have been gaining
he should not have been gaining
we should not have been gaining
you should not have been gaining
they should not have been gaining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I gain?
should you gain?
should he gain?
should we gain?
should you gain?
should they gain? 	should I be gaining?
should you be gaining?
should he be gaining?
should we be gaining?
should you be gaining?
should they be gaining? 	should I have gained?
should you have gained?
should he have gained?
should we have gained?
should you have gained?
should they have gained? 	should I have been gaining?
should you have been gaining?
should he have been gaining?
should we have been gaining?
should you have been gaining?
should they have been gaining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not gain?
should you not gain?
should he not gain?
should we not gain?
should you not gain?
should they not gain? 	should I not be gaining?
should you not be gaining?
should he not be gaining?
should we not be gaining?
should you not be gaining?
should they not be gaining? 	should I not have gained?
should you not have gained?
should he not have gained?
should we not have gained?
should you not have gained?
should they not have gained? 	should I not have been gaining?
should you not have been gaining?
should he not have been gaining?
should we not have been gaining?
should you not have been gaining?
should they not have been gaining?