English verb conjugation
MUST COUNTERWEIGHT

Regular verb: counterweight - counterweighted - counterweighted

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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