should tremble
Regular verb: tremble - trembled- trembled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd tremble
you'd tremble
she'd tremble
we'd tremble
you'd tremble
they'd tremble 	I'd be trembling
you'd be trembling
she'd be trembling
we'd be trembling
you'd be trembling
they'd be trembling	I should've trembled
you should've trembled
she should've trembled
we should've trembled
you should've trembled
they should've trembled	I should've been trembling
you should've been trembling
she should've been trembling
we should've been trembling
you should've been trembling
they should've been trembling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't tremble
you shouldn't tremble
she shouldn't tremble
we shouldn't tremble
you shouldn't tremble
they shouldn't tremble 	I shouldn't be trembling
you shouldn't be trembling
she shouldn't be trembling
we shouldn't be trembling
you shouldn't be trembling
they shouldn't be trembling	I shouldn't have trembled
you shouldn't have trembled
she shouldn't have trembled
we shouldn't have trembled
you shouldn't have trembled
they shouldn't have trembled	I shouldn't have been trembling
you shouldn't have been trembling
she shouldn't have been trembling
we shouldn't have been trembling
you shouldn't have been trembling
they shouldn't have been trembling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I tremble?
should you tremble?
should she tremble?
should we tremble?
should you tremble?
should they tremble? 	should I be trembling?
should you be trembling?
should she be trembling?
should we be trembling?
should you be trembling?
should they be trembling? 	should I have trembled?
should you have trembled?
should she have trembled?
should we have trembled?
should you have trembled?
should they have trembled? 	should I have been trembling?
should you have been trembling?
should she have been trembling?
should we have been trembling?
should you have been trembling?
should they have been trembling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I tremble?
shouldn't you tremble?
shouldn't she tremble?
shouldn't we tremble?
shouldn't you tremble?
shouldn't they tremble? 	shouldn't I be trembling?
shouldn't you be trembling?
shouldn't she be trembling?
shouldn't we be trembling?
shouldn't you be trembling?
shouldn't they be trembling? 	shouldn't I have trembled?
shouldn't you have trembled?
shouldn't she have trembled?
shouldn't we have trembled?
shouldn't you have trembled?
shouldn't they have trembled? 	shouldn't I have been trembling?
shouldn't you have been trembling?
shouldn't she have been trembling?
shouldn't we have been trembling?
shouldn't you have been trembling?
shouldn't they have been trembling?