could sass
Regular verb: sass - sassed- sassed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could sass
you could sass
she could sass
we could sass
you could sass
they could sass 	I could be sassing
you could be sassing
she could be sassing
we could be sassing
you could be sassing
they could be sassing	I could have sassed
you could have sassed
she could have sassed
we could have sassed
you could have sassed
they could have sassed	I could have been sassing
you could have been sassing
she could have been sassing
we could have been sassing
you could have been sassing
they could have been sassing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't sass
you couldn't sass
she couldn't sass
we couldn't sass
you couldn't sass
they couldn't sass 	I couldn't be sassing
you couldn't be sassing
she couldn't be sassing
we couldn't be sassing
you couldn't be sassing
they couldn't be sassing	I couldn't have sassed
you couldn't have sassed
she couldn't have sassed
we couldn't have sassed
you couldn't have sassed
they couldn't have sassed	I couldn't have been sassing
you couldn't have been sassing
she couldn't have been sassing
we couldn't have been sassing
you couldn't have been sassing
they couldn't have been sassing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I sass?
could you sass?
could she sass?
could we sass?
could you sass?
could they sass? 	could I be sassing?
could you be sassing?
could she be sassing?
could we be sassing?
could you be sassing?
could they be sassing? 	could I have sassed?
could you have sassed?
could she have sassed?
could we have sassed?
could you have sassed?
could they have sassed? 	could I have been sassing?
could you have been sassing?
could she have been sassing?
could we have been sassing?
could you have been sassing?
could they have been sassing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I sass?
couldn't you sass?
couldn't she sass?
couldn't we sass?
couldn't you sass?
couldn't they sass? 	couldn't I be sassing?
couldn't you be sassing?
couldn't she be sassing?
couldn't we be sassing?
couldn't you be sassing?
couldn't they be sassing? 	couldn't I have sassed?
couldn't you have sassed?
couldn't she have sassed?
couldn't we have sassed?
couldn't you have sassed?
couldn't they have sassed? 	couldn't I have been sassing?
couldn't you have been sassing?
couldn't she have been sassing?
couldn't we have been sassing?
couldn't you have been sassing?
couldn't they have been sassing?