should buy
Irregular verb: buy - bought- bought

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd buy
you'd buy
he'd buy
we'd buy
you'd buy
they'd buy 	I'd be buying
you'd be buying
he'd be buying
we'd be buying
you'd be buying
they'd be buying	I should've bought
you should've bought
he should've bought
we should've bought
you should've bought
they should've bought	I should've been buying
you should've been buying
he should've been buying
we should've been buying
you should've been buying
they should've been buying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't buy
you shouldn't buy
he shouldn't buy
we shouldn't buy
you shouldn't buy
they shouldn't buy 	I shouldn't be buying
you shouldn't be buying
he shouldn't be buying
we shouldn't be buying
you shouldn't be buying
they shouldn't be buying	I shouldn't have bought
you shouldn't have bought
he shouldn't have bought
we shouldn't have bought
you shouldn't have bought
they shouldn't have bought	I shouldn't have been buying
you shouldn't have been buying
he shouldn't have been buying
we shouldn't have been buying
you shouldn't have been buying
they shouldn't have been buying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I buy?
should you buy?
should he buy?
should we buy?
should you buy?
should they buy? 	should I be buying?
should you be buying?
should he be buying?
should we be buying?
should you be buying?
should they be buying? 	should I have bought?
should you have bought?
should he have bought?
should we have bought?
should you have bought?
should they have bought? 	should I have been buying?
should you have been buying?
should he have been buying?
should we have been buying?
should you have been buying?
should they have been buying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I buy?
shouldn't you buy?
shouldn't he buy?
shouldn't we buy?
shouldn't you buy?
shouldn't they buy? 	shouldn't I be buying?
shouldn't you be buying?
shouldn't he be buying?
shouldn't we be buying?
shouldn't you be buying?
shouldn't they be buying? 	shouldn't I have bought?
shouldn't you have bought?
shouldn't he have bought?
shouldn't we have bought?
shouldn't you have bought?
shouldn't they have bought? 	shouldn't I have been buying?
shouldn't you have been buying?
shouldn't he have been buying?
shouldn't we have been buying?
shouldn't you have been buying?
shouldn't they have been buying?