must counterweight
Verbe régulier : counterweight - counterweighted- counterweighted

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must counterweight
you must counterweight
he must counterweight
we must counterweight
you must counterweight
they must counterweight 	I must be counterweighting
you must be counterweighting
he must be counterweighting
we must be counterweighting
you must be counterweighting
they must be counterweighting	I must have counterweighted
you must have counterweighted
he must have counterweighted
we must have counterweighted
you must have counterweighted
they must have counterweighted	I must have been counterweighting
you must have been counterweighting
he must have been counterweighting
we must have been counterweighting
you must have been counterweighting
they must have been counterweighting	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not counterweight
you must not counterweight
he must not counterweight
we must not counterweight
you must not counterweight
they must not counterweight 	I must not be counterweighting
you must not be counterweighting
he must not be counterweighting
we must not be counterweighting
you must not be counterweighting
they must not be counterweighting	I must not have counterweighted
you must not have counterweighted
he must not have counterweighted
we must not have counterweighted
you must not have counterweighted
they must not have counterweighted	I must not have been counterweighting
you must not have been counterweighting
he must not have been counterweighting
we must not have been counterweighting
you must not have been counterweighting
they must not have been counterweighting	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I counterweight?
must you counterweight?
must he counterweight?
must we counterweight?
must you counterweight?
must they counterweight? 	must I be counterweighting?
must you be counterweighting?
must he be counterweighting?
must we be counterweighting?
must you be counterweighting?
must they be counterweighting? 	must I have counterweighted?
must you have counterweighted?
must he have counterweighted?
must we have counterweighted?
must you have counterweighted?
must they have counterweighted? 	must I have been counterweighting?
must you have been counterweighting?
must he have been counterweighting?
must we have been counterweighting?
must you have been counterweighting?
must they have been counterweighting? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not counterweight?
must you not counterweight?
must he not counterweight?
must we not counterweight?
must you not counterweight?
must they not counterweight? 	must I not be counterweighting?
must you not be counterweighting?
must he not be counterweighting?
must we not be counterweighting?
must you not be counterweighting?
must they not be counterweighting? 	must I not have counterweighted?
must you not have counterweighted?
must he not have counterweighted?
must we not have counterweighted?
must you not have counterweighted?
must they not have counterweighted? 	must I not have been counterweighting?
must you not have been counterweighting?
must he not have been counterweighting?
must we not have been counterweighting?
must you not have been counterweighting?
must they not have been counterweighting?