could seal
Regular verb: seal - sealed- sealed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could seal
you could seal
she could seal
we could seal
you could seal
they could seal 	I could be sealing
you could be sealing
she could be sealing
we could be sealing
you could be sealing
they could be sealing	I could have sealed
you could have sealed
she could have sealed
we could have sealed
you could have sealed
they could have sealed	I could have been sealing
you could have been sealing
she could have been sealing
we could have been sealing
you could have been sealing
they could have been sealing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not seal
you could not seal
she could not seal
we could not seal
you could not seal
they could not seal 	I could not be sealing
you could not be sealing
she could not be sealing
we could not be sealing
you could not be sealing
they could not be sealing	I could not have sealed
you could not have sealed
she could not have sealed
we could not have sealed
you could not have sealed
they could not have sealed	I could not have been sealing
you could not have been sealing
she could not have been sealing
we could not have been sealing
you could not have been sealing
they could not have been sealing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I seal?
could you seal?
could she seal?
could we seal?
could you seal?
could they seal? 	could I be sealing?
could you be sealing?
could she be sealing?
could we be sealing?
could you be sealing?
could they be sealing? 	could I have sealed?
could you have sealed?
could she have sealed?
could we have sealed?
could you have sealed?
could they have sealed? 	could I have been sealing?
could you have been sealing?
could she have been sealing?
could we have been sealing?
could you have been sealing?
could they have been sealing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not seal?
could you not seal?
could she not seal?
could we not seal?
could you not seal?
could they not seal? 	could I not be sealing?
could you not be sealing?
could she not be sealing?
could we not be sealing?
could you not be sealing?
could they not be sealing? 	could I not have sealed?
could you not have sealed?
could she not have sealed?
could we not have sealed?
could you not have sealed?
could they not have sealed? 	could I not have been sealing?
could you not have been sealing?
could she not have been sealing?
could we not have been sealing?
could you not have been sealing?
could they not have been sealing?