can couple
Regular verb: couple - coupled- coupled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can couple
you can couple
she can couple
we can couple
you can couple
they can couple 	I can be coupling
you can be coupling
she can be coupling
we can be coupling
you can be coupling
they can be coupling	I can have coupled
you can have coupled
she can have coupled
we can have coupled
you can have coupled
they can have coupled	I can have been coupling
you can have been coupling
she can have been coupling
we can have been coupling
you can have been coupling
they can have been coupling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't couple
you can't couple
she can't couple
we can't couple
you can't couple
they can't couple 	I can't be coupling
you can't be coupling
she can't be coupling
we can't be coupling
you can't be coupling
they can't be coupling	I can't have coupled
you can't have coupled
she can't have coupled
we can't have coupled
you can't have coupled
they can't have coupled	I can't have been coupling
you can't have been coupling
she can't have been coupling
we can't have been coupling
you can't have been coupling
they can't have been coupling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I couple?
can you couple?
can she couple?
can we couple?
can you couple?
can they couple? 	can I be coupling?
can you be coupling?
can she be coupling?
can we be coupling?
can you be coupling?
can they be coupling? 	can I have coupled?
can you have coupled?
can she have coupled?
can we have coupled?
can you have coupled?
can they have coupled? 	can I have been coupling?
can you have been coupling?
can she have been coupling?
can we have been coupling?
can you have been coupling?
can they have been coupling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I couple?
can't you couple?
can't she couple?
can't we couple?
can't you couple?
can't they couple? 	can't I be coupling?
can't you be coupling?
can't she be coupling?
can't we be coupling?
can't you be coupling?
can't they be coupling? 	can't I have coupled?
can't you have coupled?
can't she have coupled?
can't we have coupled?
can't you have coupled?
can't they have coupled? 	can't I have been coupling?
can't you have been coupling?
can't she have been coupling?
can't we have been coupling?
can't you have been coupling?
can't they have been coupling?