can counterweight
Regular verb: counterweight - counterweighted- counterweighted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can counterweight
you can counterweight
he can counterweight
we can counterweight
you can counterweight
they can counterweight 	I can be counterweighting
you can be counterweighting
he can be counterweighting
we can be counterweighting
you can be counterweighting
they can be counterweighting	I can have counterweighted
you can have counterweighted
he can have counterweighted
we can have counterweighted
you can have counterweighted
they can have counterweighted	I can have been counterweighting
you can have been counterweighting
he can have been counterweighting
we can have been counterweighting
you can have been counterweighting
they can have been counterweighting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot counterweight
you cannot counterweight
he cannot counterweight
we cannot counterweight
you cannot counterweight
they cannot counterweight 	I cannot be counterweighting
you cannot be counterweighting
he cannot be counterweighting
we cannot be counterweighting
you cannot be counterweighting
they cannot be counterweighting	I cannot have counterweighted
you cannot have counterweighted
he cannot have counterweighted
we cannot have counterweighted
you cannot have counterweighted
they cannot have counterweighted	I cannot have been counterweighting
you cannot have been counterweighting
he cannot have been counterweighting
we cannot have been counterweighting
you cannot have been counterweighting
they cannot have been counterweighting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I counterweight?
can you counterweight?
can he counterweight?
can we counterweight?
can you counterweight?
can they counterweight? 	can I be counterweighting?
can you be counterweighting?
can he be counterweighting?
can we be counterweighting?
can you be counterweighting?
can they be counterweighting? 	can I have counterweighted?
can you have counterweighted?
can he have counterweighted?
can we have counterweighted?
can you have counterweighted?
can they have counterweighted? 	can I have been counterweighting?
can you have been counterweighting?
can he have been counterweighting?
can we have been counterweighting?
can you have been counterweighting?
can they have been counterweighting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not counterweight?
can you not counterweight?
can he not counterweight?
can we not counterweight?
can you not counterweight?
can they not counterweight? 	can I not be counterweighting?
can you not be counterweighting?
can he not be counterweighting?
can we not be counterweighting?
can you not be counterweighting?
can they not be counterweighting? 	can I not have counterweighted?
can you not have counterweighted?
can he not have counterweighted?
can we not have counterweighted?
can you not have counterweighted?
can they not have counterweighted? 	can I not have been counterweighting?
can you not have been counterweighting?
can he not have been counterweighting?
can we not have been counterweighting?
can you not have been counterweighting?
can they not have been counterweighting?