could bombinate
Regular verb: bombinate - bombinated- bombinated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could bombinate
you could bombinate
she could bombinate
we could bombinate
you could bombinate
they could bombinate 	I could be bombinating
you could be bombinating
she could be bombinating
we could be bombinating
you could be bombinating
they could be bombinating	I could have bombinated
you could have bombinated
she could have bombinated
we could have bombinated
you could have bombinated
they could have bombinated	I could have been bombinating
you could have been bombinating
she could have been bombinating
we could have been bombinating
you could have been bombinating
they could have been bombinating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't bombinate
you couldn't bombinate
she couldn't bombinate
we couldn't bombinate
you couldn't bombinate
they couldn't bombinate 	I couldn't be bombinating
you couldn't be bombinating
she couldn't be bombinating
we couldn't be bombinating
you couldn't be bombinating
they couldn't be bombinating	I couldn't have bombinated
you couldn't have bombinated
she couldn't have bombinated
we couldn't have bombinated
you couldn't have bombinated
they couldn't have bombinated	I couldn't have been bombinating
you couldn't have been bombinating
she couldn't have been bombinating
we couldn't have been bombinating
you couldn't have been bombinating
they couldn't have been bombinating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I bombinate?
could you bombinate?
could she bombinate?
could we bombinate?
could you bombinate?
could they bombinate? 	could I be bombinating?
could you be bombinating?
could she be bombinating?
could we be bombinating?
could you be bombinating?
could they be bombinating? 	could I have bombinated?
could you have bombinated?
could she have bombinated?
could we have bombinated?
could you have bombinated?
could they have bombinated? 	could I have been bombinating?
could you have been bombinating?
could she have been bombinating?
could we have been bombinating?
could you have been bombinating?
could they have been bombinating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I bombinate?
couldn't you bombinate?
couldn't she bombinate?
couldn't we bombinate?
couldn't you bombinate?
couldn't they bombinate? 	couldn't I be bombinating?
couldn't you be bombinating?
couldn't she be bombinating?
couldn't we be bombinating?
couldn't you be bombinating?
couldn't they be bombinating? 	couldn't I have bombinated?
couldn't you have bombinated?
couldn't she have bombinated?
couldn't we have bombinated?
couldn't you have bombinated?
couldn't they have bombinated? 	couldn't I have been bombinating?
couldn't you have been bombinating?
couldn't she have been bombinating?
couldn't we have been bombinating?
couldn't you have been bombinating?
couldn't they have been bombinating?