should gas
Verbo regular: gas - gassed- gassed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should gas
you should gas
he should gas
we should gas
you should gas
they should gas 	I should be gassing
you should be gassing
he should be gassing
we should be gassing
you should be gassing
they should be gassing	I should have gassed
you should have gassed
he should have gassed
we should have gassed
you should have gassed
they should have gassed	I should have been gassing
you should have been gassing
he should have been gassing
we should have been gassing
you should have been gassing
they should have been gassing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should not gas
you should not gas
he should not gas
we should not gas
you should not gas
they should not gas 	I should not be gassing
you should not be gassing
he should not be gassing
we should not be gassing
you should not be gassing
they should not be gassing	I should not have gassed
you should not have gassed
he should not have gassed
we should not have gassed
you should not have gassed
they should not have gassed	I should not have been gassing
you should not have been gassing
he should not have been gassing
we should not have been gassing
you should not have been gassing
they should not have been gassing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I not gas?
should you not gas?
should he not gas?
should we not gas?
should you not gas?
should they not gas? 	should I not be gassing?
should you not be gassing?
should he not be gassing?
should we not be gassing?
should you not be gassing?
should they not be gassing? 	should I not have gassed?
should you not have gassed?
should he not have gassed?
should we not have gassed?
should you not have gassed?
should they not have gassed? 	should I not have been gassing?
should you not have been gassing?
should he not have been gassing?
should we not have been gassing?
should you not have been gassing?
should they not have been gassing?