may counterweight
Regular verb: counterweight - counterweighted- counterweighted

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't counterweight
you mayn't counterweight
she mayn't counterweight
we mayn't counterweight
you mayn't counterweight
they mayn't counterweight 	I mayn't be counterweighting
you mayn't be counterweighting
she mayn't be counterweighting
we mayn't be counterweighting
you mayn't be counterweighting
they mayn't be counterweighting	I mayn't have counterweighted
you mayn't have counterweighted
she mayn't have counterweighted
we mayn't have counterweighted
you mayn't have counterweighted
they mayn't have counterweighted	I mayn't have been counterweighting
you mayn't have been counterweighting
she mayn't have been counterweighting
we mayn't have been counterweighting
you mayn't have been counterweighting
they mayn't have been counterweighting	

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

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I counterweight?
mayn't you counterweight?
mayn't she counterweight?
mayn't we counterweight?
mayn't you counterweight?
mayn't they counterweight? 	mayn't I be counterweighting?
mayn't you be counterweighting?
mayn't she be counterweighting?
mayn't we be counterweighting?
mayn't you be counterweighting?
mayn't they be counterweighting? 	mayn't I have counterweighted?
mayn't you have counterweighted?
mayn't she have counterweighted?
mayn't we have counterweighted?
mayn't you have counterweighted?
mayn't they have counterweighted? 	mayn't I have been counterweighting?
mayn't you have been counterweighting?
mayn't she have been counterweighting?
mayn't we have been counterweighting?
mayn't you have been counterweighting?
mayn't they have been counterweighting?