must task
Regular verb: task - tasked- tasked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must task
you must task
she must task
we must task
you must task
they must task 	I must be tasking
you must be tasking
she must be tasking
we must be tasking
you must be tasking
they must be tasking	I must have tasked
you must have tasked
she must have tasked
we must have tasked
you must have tasked
they must have tasked	I must have been tasking
you must have been tasking
she must have been tasking
we must have been tasking
you must have been tasking
they must have been tasking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not task
you must not task
she must not task
we must not task
you must not task
they must not task 	I must not be tasking
you must not be tasking
she must not be tasking
we must not be tasking
you must not be tasking
they must not be tasking	I must not have tasked
you must not have tasked
she must not have tasked
we must not have tasked
you must not have tasked
they must not have tasked	I must not have been tasking
you must not have been tasking
she must not have been tasking
we must not have been tasking
you must not have been tasking
they must not have been tasking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I task?
must you task?
must she task?
must we task?
must you task?
must they task? 	must I be tasking?
must you be tasking?
must she be tasking?
must we be tasking?
must you be tasking?
must they be tasking? 	must I have tasked?
must you have tasked?
must she have tasked?
must we have tasked?
must you have tasked?
must they have tasked? 	must I have been tasking?
must you have been tasking?
must she have been tasking?
must we have been tasking?
must you have been tasking?
must they have been tasking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not task?
must you not task?
must she not task?
must we not task?
must you not task?
must they not task? 	must I not be tasking?
must you not be tasking?
must she not be tasking?
must we not be tasking?
must you not be tasking?
must they not be tasking? 	must I not have tasked?
must you not have tasked?
must she not have tasked?
must we not have tasked?
must you not have tasked?
must they not have tasked? 	must I not have been tasking?
must you not have been tasking?
must she not have been tasking?
must we not have been tasking?
must you not have been tasking?
must they not have been tasking?