must long
Regular verb: long - longed- longed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must long
you must long
she must long
we must long
you must long
they must long 	I must be longing
you must be longing
she must be longing
we must be longing
you must be longing
they must be longing	I must have longed
you must have longed
she must have longed
we must have longed
you must have longed
they must have longed	I must have been longing
you must have been longing
she must have been longing
we must have been longing
you must have been longing
they must have been longing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not long
you must not long
she must not long
we must not long
you must not long
they must not long 	I must not be longing
you must not be longing
she must not be longing
we must not be longing
you must not be longing
they must not be longing	I must not have longed
you must not have longed
she must not have longed
we must not have longed
you must not have longed
they must not have longed	I must not have been longing
you must not have been longing
she must not have been longing
we must not have been longing
you must not have been longing
they must not have been longing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I long?
must you long?
must she long?
must we long?
must you long?
must they long? 	must I be longing?
must you be longing?
must she be longing?
must we be longing?
must you be longing?
must they be longing? 	must I have longed?
must you have longed?
must she have longed?
must we have longed?
must you have longed?
must they have longed? 	must I have been longing?
must you have been longing?
must she have been longing?
must we have been longing?
must you have been longing?
must they have been longing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not long?
must you not long?
must she not long?
must we not long?
must you not long?
must they not long? 	must I not be longing?
must you not be longing?
must she not be longing?
must we not be longing?
must you not be longing?
must they not be longing? 	must I not have longed?
must you not have longed?
must she not have longed?
must we not have longed?
must you not have longed?
must they not have longed? 	must I not have been longing?
must you not have been longing?
must she not have been longing?
must we not have been longing?
must you not have been longing?
must they not have been longing?