could thrall
Regular verb: thrall - thralled- thralled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could thrall
you could thrall
she could thrall
we could thrall
you could thrall
they could thrall 	I could be thralling
you could be thralling
she could be thralling
we could be thralling
you could be thralling
they could be thralling	I could have thralled
you could have thralled
she could have thralled
we could have thralled
you could have thralled
they could have thralled	I could have been thralling
you could have been thralling
she could have been thralling
we could have been thralling
you could have been thralling
they could have been thralling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't thrall
you couldn't thrall
she couldn't thrall
we couldn't thrall
you couldn't thrall
they couldn't thrall 	I couldn't be thralling
you couldn't be thralling
she couldn't be thralling
we couldn't be thralling
you couldn't be thralling
they couldn't be thralling	I couldn't have thralled
you couldn't have thralled
she couldn't have thralled
we couldn't have thralled
you couldn't have thralled
they couldn't have thralled	I couldn't have been thralling
you couldn't have been thralling
she couldn't have been thralling
we couldn't have been thralling
you couldn't have been thralling
they couldn't have been thralling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I thrall?
could you thrall?
could she thrall?
could we thrall?
could you thrall?
could they thrall? 	could I be thralling?
could you be thralling?
could she be thralling?
could we be thralling?
could you be thralling?
could they be thralling? 	could I have thralled?
could you have thralled?
could she have thralled?
could we have thralled?
could you have thralled?
could they have thralled? 	could I have been thralling?
could you have been thralling?
could she have been thralling?
could we have been thralling?
could you have been thralling?
could they have been thralling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I thrall?
couldn't you thrall?
couldn't she thrall?
couldn't we thrall?
couldn't you thrall?
couldn't they thrall? 	couldn't I be thralling?
couldn't you be thralling?
couldn't she be thralling?
couldn't we be thralling?
couldn't you be thralling?
couldn't they be thralling? 	couldn't I have thralled?
couldn't you have thralled?
couldn't she have thralled?
couldn't we have thralled?
couldn't you have thralled?
couldn't they have thralled? 	couldn't I have been thralling?
couldn't you have been thralling?
couldn't she have been thralling?
couldn't we have been thralling?
couldn't you have been thralling?
couldn't they have been thralling?