could carburet
Regular verb: carburet - carbureted- carbureted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could carburet
you could carburet
she could carburet
we could carburet
you could carburet
they could carburet 	I could be carbureting
you could be carbureting
she could be carbureting
we could be carbureting
you could be carbureting
they could be carbureting	I could have carbureted
you could have carbureted
she could have carbureted
we could have carbureted
you could have carbureted
they could have carbureted	I could have been carbureting
you could have been carbureting
she could have been carbureting
we could have been carbureting
you could have been carbureting
they could have been carbureting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't carburet
you couldn't carburet
she couldn't carburet
we couldn't carburet
you couldn't carburet
they couldn't carburet 	I couldn't be carbureting
you couldn't be carbureting
she couldn't be carbureting
we couldn't be carbureting
you couldn't be carbureting
they couldn't be carbureting	I couldn't have carbureted
you couldn't have carbureted
she couldn't have carbureted
we couldn't have carbureted
you couldn't have carbureted
they couldn't have carbureted	I couldn't have been carbureting
you couldn't have been carbureting
she couldn't have been carbureting
we couldn't have been carbureting
you couldn't have been carbureting
they couldn't have been carbureting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I carburet?
could you carburet?
could she carburet?
could we carburet?
could you carburet?
could they carburet? 	could I be carbureting?
could you be carbureting?
could she be carbureting?
could we be carbureting?
could you be carbureting?
could they be carbureting? 	could I have carbureted?
could you have carbureted?
could she have carbureted?
could we have carbureted?
could you have carbureted?
could they have carbureted? 	could I have been carbureting?
could you have been carbureting?
could she have been carbureting?
could we have been carbureting?
could you have been carbureting?
could they have been carbureting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I carburet?
couldn't you carburet?
couldn't she carburet?
couldn't we carburet?
couldn't you carburet?
couldn't they carburet? 	couldn't I be carbureting?
couldn't you be carbureting?
couldn't she be carbureting?
couldn't we be carbureting?
couldn't you be carbureting?
couldn't they be carbureting? 	couldn't I have carbureted?
couldn't you have carbureted?
couldn't she have carbureted?
couldn't we have carbureted?
couldn't you have carbureted?
couldn't they have carbureted? 	couldn't I have been carbureting?
couldn't you have been carbureting?
couldn't she have been carbureting?
couldn't we have been carbureting?
couldn't you have been carbureting?
couldn't they have been carbureting?