must bilk
Regular verb: bilk - bilked- bilked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must bilk
you must bilk
she must bilk
we must bilk
you must bilk
they must bilk 	I must be bilking
you must be bilking
she must be bilking
we must be bilking
you must be bilking
they must be bilking	I must have bilked
you must have bilked
she must have bilked
we must have bilked
you must have bilked
they must have bilked	I must have been bilking
you must have been bilking
she must have been bilking
we must have been bilking
you must have been bilking
they must have been bilking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not bilk
you must not bilk
she must not bilk
we must not bilk
you must not bilk
they must not bilk 	I must not be bilking
you must not be bilking
she must not be bilking
we must not be bilking
you must not be bilking
they must not be bilking	I must not have bilked
you must not have bilked
she must not have bilked
we must not have bilked
you must not have bilked
they must not have bilked	I must not have been bilking
you must not have been bilking
she must not have been bilking
we must not have been bilking
you must not have been bilking
they must not have been bilking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I bilk?
must you bilk?
must she bilk?
must we bilk?
must you bilk?
must they bilk? 	must I be bilking?
must you be bilking?
must she be bilking?
must we be bilking?
must you be bilking?
must they be bilking? 	must I have bilked?
must you have bilked?
must she have bilked?
must we have bilked?
must you have bilked?
must they have bilked? 	must I have been bilking?
must you have been bilking?
must she have been bilking?
must we have been bilking?
must you have been bilking?
must they have been bilking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not bilk?
must you not bilk?
must she not bilk?
must we not bilk?
must you not bilk?
must they not bilk? 	must I not be bilking?
must you not be bilking?
must she not be bilking?
must we not be bilking?
must you not be bilking?
must they not be bilking? 	must I not have bilked?
must you not have bilked?
must she not have bilked?
must we not have bilked?
must you not have bilked?
must they not have bilked? 	must I not have been bilking?
must you not have been bilking?
must she not have been bilking?
must we not have been bilking?
must you not have been bilking?
must they not have been bilking?