could baste
Regular verb: baste - basted- basted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could baste
you could baste
he could baste
we could baste
you could baste
they could baste 	I could be basting
you could be basting
he could be basting
we could be basting
you could be basting
they could be basting	I could have basted
you could have basted
he could have basted
we could have basted
you could have basted
they could have basted	I could have been basting
you could have been basting
he could have been basting
we could have been basting
you could have been basting
they could have been basting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't baste
you couldn't baste
he couldn't baste
we couldn't baste
you couldn't baste
they couldn't baste 	I couldn't be basting
you couldn't be basting
he couldn't be basting
we couldn't be basting
you couldn't be basting
they couldn't be basting	I couldn't have basted
you couldn't have basted
he couldn't have basted
we couldn't have basted
you couldn't have basted
they couldn't have basted	I couldn't have been basting
you couldn't have been basting
he couldn't have been basting
we couldn't have been basting
you couldn't have been basting
they couldn't have been basting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I baste?
could you baste?
could he baste?
could we baste?
could you baste?
could they baste? 	could I be basting?
could you be basting?
could he be basting?
could we be basting?
could you be basting?
could they be basting? 	could I have basted?
could you have basted?
could he have basted?
could we have basted?
could you have basted?
could they have basted? 	could I have been basting?
could you have been basting?
could he have been basting?
could we have been basting?
could you have been basting?
could they have been basting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I baste?
couldn't you baste?
couldn't he baste?
couldn't we baste?
couldn't you baste?
couldn't they baste? 	couldn't I be basting?
couldn't you be basting?
couldn't he be basting?
couldn't we be basting?
couldn't you be basting?
couldn't they be basting? 	couldn't I have basted?
couldn't you have basted?
couldn't he have basted?
couldn't we have basted?
couldn't you have basted?
couldn't they have basted? 	couldn't I have been basting?
couldn't you have been basting?
couldn't he have been basting?
couldn't we have been basting?
couldn't you have been basting?
couldn't they have been basting?