could scheme
Regular verb: scheme - schemed- schemed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could scheme
you could scheme
she could scheme
we could scheme
you could scheme
they could scheme 	I could be scheming
you could be scheming
she could be scheming
we could be scheming
you could be scheming
they could be scheming	I could have schemed
you could have schemed
she could have schemed
we could have schemed
you could have schemed
they could have schemed	I could have been scheming
you could have been scheming
she could have been scheming
we could have been scheming
you could have been scheming
they could have been scheming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't scheme
you couldn't scheme
she couldn't scheme
we couldn't scheme
you couldn't scheme
they couldn't scheme 	I couldn't be scheming
you couldn't be scheming
she couldn't be scheming
we couldn't be scheming
you couldn't be scheming
they couldn't be scheming	I couldn't have schemed
you couldn't have schemed
she couldn't have schemed
we couldn't have schemed
you couldn't have schemed
they couldn't have schemed	I couldn't have been scheming
you couldn't have been scheming
she couldn't have been scheming
we couldn't have been scheming
you couldn't have been scheming
they couldn't have been scheming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I scheme?
could you scheme?
could she scheme?
could we scheme?
could you scheme?
could they scheme? 	could I be scheming?
could you be scheming?
could she be scheming?
could we be scheming?
could you be scheming?
could they be scheming? 	could I have schemed?
could you have schemed?
could she have schemed?
could we have schemed?
could you have schemed?
could they have schemed? 	could I have been scheming?
could you have been scheming?
could she have been scheming?
could we have been scheming?
could you have been scheming?
could they have been scheming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I scheme?
couldn't you scheme?
couldn't she scheme?
couldn't we scheme?
couldn't you scheme?
couldn't they scheme? 	couldn't I be scheming?
couldn't you be scheming?
couldn't she be scheming?
couldn't we be scheming?
couldn't you be scheming?
couldn't they be scheming? 	couldn't I have schemed?
couldn't you have schemed?
couldn't she have schemed?
couldn't we have schemed?
couldn't you have schemed?
couldn't they have schemed? 	couldn't I have been scheming?
couldn't you have been scheming?
couldn't she have been scheming?
couldn't we have been scheming?
couldn't you have been scheming?
couldn't they have been scheming?