should ruin
Regular verb: ruin - ruined- ruined

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd ruin
you'd ruin
he'd ruin
we'd ruin
you'd ruin
they'd ruin 	I'd be ruining
you'd be ruining
he'd be ruining
we'd be ruining
you'd be ruining
they'd be ruining	I should've ruined
you should've ruined
he should've ruined
we should've ruined
you should've ruined
they should've ruined	I should've been ruining
you should've been ruining
he should've been ruining
we should've been ruining
you should've been ruining
they should've been ruining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't ruin
you shouldn't ruin
he shouldn't ruin
we shouldn't ruin
you shouldn't ruin
they shouldn't ruin 	I shouldn't be ruining
you shouldn't be ruining
he shouldn't be ruining
we shouldn't be ruining
you shouldn't be ruining
they shouldn't be ruining	I shouldn't have ruined
you shouldn't have ruined
he shouldn't have ruined
we shouldn't have ruined
you shouldn't have ruined
they shouldn't have ruined	I shouldn't have been ruining
you shouldn't have been ruining
he shouldn't have been ruining
we shouldn't have been ruining
you shouldn't have been ruining
they shouldn't have been ruining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I ruin?
should you ruin?
should he ruin?
should we ruin?
should you ruin?
should they ruin? 	should I be ruining?
should you be ruining?
should he be ruining?
should we be ruining?
should you be ruining?
should they be ruining? 	should I have ruined?
should you have ruined?
should he have ruined?
should we have ruined?
should you have ruined?
should they have ruined? 	should I have been ruining?
should you have been ruining?
should he have been ruining?
should we have been ruining?
should you have been ruining?
should they have been ruining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I ruin?
shouldn't you ruin?
shouldn't he ruin?
shouldn't we ruin?
shouldn't you ruin?
shouldn't they ruin? 	shouldn't I be ruining?
shouldn't you be ruining?
shouldn't he be ruining?
shouldn't we be ruining?
shouldn't you be ruining?
shouldn't they be ruining? 	shouldn't I have ruined?
shouldn't you have ruined?
shouldn't he have ruined?
shouldn't we have ruined?
shouldn't you have ruined?
shouldn't they have ruined? 	shouldn't I have been ruining?
shouldn't you have been ruining?
shouldn't he have been ruining?
shouldn't we have been ruining?
shouldn't you have been ruining?
shouldn't they have been ruining?