could bake
Regular verb: bake - baked- baked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could bake
you could bake
she could bake
we could bake
you could bake
they could bake 	I could be baking
you could be baking
she could be baking
we could be baking
you could be baking
they could be baking	I could have baked
you could have baked
she could have baked
we could have baked
you could have baked
they could have baked	I could have been baking
you could have been baking
she could have been baking
we could have been baking
you could have been baking
they could have been baking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't bake
you couldn't bake
she couldn't bake
we couldn't bake
you couldn't bake
they couldn't bake 	I couldn't be baking
you couldn't be baking
she couldn't be baking
we couldn't be baking
you couldn't be baking
they couldn't be baking	I couldn't have baked
you couldn't have baked
she couldn't have baked
we couldn't have baked
you couldn't have baked
they couldn't have baked	I couldn't have been baking
you couldn't have been baking
she couldn't have been baking
we couldn't have been baking
you couldn't have been baking
they couldn't have been baking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I bake?
could you bake?
could she bake?
could we bake?
could you bake?
could they bake? 	could I be baking?
could you be baking?
could she be baking?
could we be baking?
could you be baking?
could they be baking? 	could I have baked?
could you have baked?
could she have baked?
could we have baked?
could you have baked?
could they have baked? 	could I have been baking?
could you have been baking?
could she have been baking?
could we have been baking?
could you have been baking?
could they have been baking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I bake?
couldn't you bake?
couldn't she bake?
couldn't we bake?
couldn't you bake?
couldn't they bake? 	couldn't I be baking?
couldn't you be baking?
couldn't she be baking?
couldn't we be baking?
couldn't you be baking?
couldn't they be baking? 	couldn't I have baked?
couldn't you have baked?
couldn't she have baked?
couldn't we have baked?
couldn't you have baked?
couldn't they have baked? 	couldn't I have been baking?
couldn't you have been baking?
couldn't she have been baking?
couldn't we have been baking?
couldn't you have been baking?
couldn't they have been baking?