should gnaw
Regular verb: gnaw - gnawed- gnawed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd gnaw
you'd gnaw
she'd gnaw
we'd gnaw
you'd gnaw
they'd gnaw 	I'd be gnawing
you'd be gnawing
she'd be gnawing
we'd be gnawing
you'd be gnawing
they'd be gnawing	I should've gnawed
you should've gnawed
she should've gnawed
we should've gnawed
you should've gnawed
they should've gnawed	I should've been gnawing
you should've been gnawing
she should've been gnawing
we should've been gnawing
you should've been gnawing
they should've been gnawing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't gnaw
you shouldn't gnaw
she shouldn't gnaw
we shouldn't gnaw
you shouldn't gnaw
they shouldn't gnaw 	I shouldn't be gnawing
you shouldn't be gnawing
she shouldn't be gnawing
we shouldn't be gnawing
you shouldn't be gnawing
they shouldn't be gnawing	I shouldn't have gnawed
you shouldn't have gnawed
she shouldn't have gnawed
we shouldn't have gnawed
you shouldn't have gnawed
they shouldn't have gnawed	I shouldn't have been gnawing
you shouldn't have been gnawing
she shouldn't have been gnawing
we shouldn't have been gnawing
you shouldn't have been gnawing
they shouldn't have been gnawing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I gnaw?
should you gnaw?
should she gnaw?
should we gnaw?
should you gnaw?
should they gnaw? 	should I be gnawing?
should you be gnawing?
should she be gnawing?
should we be gnawing?
should you be gnawing?
should they be gnawing? 	should I have gnawed?
should you have gnawed?
should she have gnawed?
should we have gnawed?
should you have gnawed?
should they have gnawed? 	should I have been gnawing?
should you have been gnawing?
should she have been gnawing?
should we have been gnawing?
should you have been gnawing?
should they have been gnawing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I gnaw?
shouldn't you gnaw?
shouldn't she gnaw?
shouldn't we gnaw?
shouldn't you gnaw?
shouldn't they gnaw? 	shouldn't I be gnawing?
shouldn't you be gnawing?
shouldn't she be gnawing?
shouldn't we be gnawing?
shouldn't you be gnawing?
shouldn't they be gnawing? 	shouldn't I have gnawed?
shouldn't you have gnawed?
shouldn't she have gnawed?
shouldn't we have gnawed?
shouldn't you have gnawed?
shouldn't they have gnawed? 	shouldn't I have been gnawing?
shouldn't you have been gnawing?
shouldn't she have been gnawing?
shouldn't we have been gnawing?
shouldn't you have been gnawing?
shouldn't they have been gnawing?