should gnash
Regular verb: gnash - gnashed- gnashed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd gnash
you'd gnash
he'd gnash
we'd gnash
you'd gnash
they'd gnash 	I'd be gnashing
you'd be gnashing
he'd be gnashing
we'd be gnashing
you'd be gnashing
they'd be gnashing	I should've gnashed
you should've gnashed
he should've gnashed
we should've gnashed
you should've gnashed
they should've gnashed	I should've been gnashing
you should've been gnashing
he should've been gnashing
we should've been gnashing
you should've been gnashing
they should've been gnashing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't gnash
you shouldn't gnash
he shouldn't gnash
we shouldn't gnash
you shouldn't gnash
they shouldn't gnash 	I shouldn't be gnashing
you shouldn't be gnashing
he shouldn't be gnashing
we shouldn't be gnashing
you shouldn't be gnashing
they shouldn't be gnashing	I shouldn't have gnashed
you shouldn't have gnashed
he shouldn't have gnashed
we shouldn't have gnashed
you shouldn't have gnashed
they shouldn't have gnashed	I shouldn't have been gnashing
you shouldn't have been gnashing
he shouldn't have been gnashing
we shouldn't have been gnashing
you shouldn't have been gnashing
they shouldn't have been gnashing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I gnash?
should you gnash?
should he gnash?
should we gnash?
should you gnash?
should they gnash? 	should I be gnashing?
should you be gnashing?
should he be gnashing?
should we be gnashing?
should you be gnashing?
should they be gnashing? 	should I have gnashed?
should you have gnashed?
should he have gnashed?
should we have gnashed?
should you have gnashed?
should they have gnashed? 	should I have been gnashing?
should you have been gnashing?
should he have been gnashing?
should we have been gnashing?
should you have been gnashing?
should they have been gnashing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I gnash?
shouldn't you gnash?
shouldn't he gnash?
shouldn't we gnash?
shouldn't you gnash?
shouldn't they gnash? 	shouldn't I be gnashing?
shouldn't you be gnashing?
shouldn't he be gnashing?
shouldn't we be gnashing?
shouldn't you be gnashing?
shouldn't they be gnashing? 	shouldn't I have gnashed?
shouldn't you have gnashed?
shouldn't he have gnashed?
shouldn't we have gnashed?
shouldn't you have gnashed?
shouldn't they have gnashed? 	shouldn't I have been gnashing?
shouldn't you have been gnashing?
shouldn't he have been gnashing?
shouldn't we have been gnashing?
shouldn't you have been gnashing?
shouldn't they have been gnashing?