should gas
Regular verb: gas - gassed- gassed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd gas
you'd gas
he'd gas
we'd gas
you'd gas
they'd gas 	I'd be gassing
you'd be gassing
he'd be gassing
we'd be gassing
you'd be gassing
they'd be gassing	I should've gassed
you should've gassed
he should've gassed
we should've gassed
you should've gassed
they should've gassed	I should've been gassing
you should've been gassing
he should've been gassing
we should've been gassing
you should've been gassing
they should've been gassing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't gas
you shouldn't gas
he shouldn't gas
we shouldn't gas
you shouldn't gas
they shouldn't gas 	I shouldn't be gassing
you shouldn't be gassing
he shouldn't be gassing
we shouldn't be gassing
you shouldn't be gassing
they shouldn't be gassing	I shouldn't have gassed
you shouldn't have gassed
he shouldn't have gassed
we shouldn't have gassed
you shouldn't have gassed
they shouldn't have gassed	I shouldn't have been gassing
you shouldn't have been gassing
he shouldn't have been gassing
we shouldn't have been gassing
you shouldn't have been gassing
they shouldn't have been gassing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I gas?
should you gas?
should he gas?
should we gas?
should you gas?
should they gas? 	should I be gassing?
should you be gassing?
should he be gassing?
should we be gassing?
should you be gassing?
should they be gassing? 	should I have gassed?
should you have gassed?
should he have gassed?
should we have gassed?
should you have gassed?
should they have gassed? 	should I have been gassing?
should you have been gassing?
should he have been gassing?
should we have been gassing?
should you have been gassing?
should they have been gassing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I gas?
shouldn't you gas?
shouldn't he gas?
shouldn't we gas?
shouldn't you gas?
shouldn't they gas? 	shouldn't I be gassing?
shouldn't you be gassing?
shouldn't he be gassing?
shouldn't we be gassing?
shouldn't you be gassing?
shouldn't they be gassing? 	shouldn't I have gassed?
shouldn't you have gassed?
shouldn't he have gassed?
shouldn't we have gassed?
shouldn't you have gassed?
shouldn't they have gassed? 	shouldn't I have been gassing?
shouldn't you have been gassing?
shouldn't he have been gassing?
shouldn't we have been gassing?
shouldn't you have been gassing?
shouldn't they have been gassing?