must protrude
Regular verb: protrude - protruded- protruded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must protrude
you must protrude
she must protrude
we must protrude
you must protrude
they must protrude 	I must be protruding
you must be protruding
she must be protruding
we must be protruding
you must be protruding
they must be protruding	I must have protruded
you must have protruded
she must have protruded
we must have protruded
you must have protruded
they must have protruded	I must have been protruding
you must have been protruding
she must have been protruding
we must have been protruding
you must have been protruding
they must have been protruding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not protrude
you must not protrude
she must not protrude
we must not protrude
you must not protrude
they must not protrude 	I must not be protruding
you must not be protruding
she must not be protruding
we must not be protruding
you must not be protruding
they must not be protruding	I must not have protruded
you must not have protruded
she must not have protruded
we must not have protruded
you must not have protruded
they must not have protruded	I must not have been protruding
you must not have been protruding
she must not have been protruding
we must not have been protruding
you must not have been protruding
they must not have been protruding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I protrude?
must you protrude?
must she protrude?
must we protrude?
must you protrude?
must they protrude? 	must I be protruding?
must you be protruding?
must she be protruding?
must we be protruding?
must you be protruding?
must they be protruding? 	must I have protruded?
must you have protruded?
must she have protruded?
must we have protruded?
must you have protruded?
must they have protruded? 	must I have been protruding?
must you have been protruding?
must she have been protruding?
must we have been protruding?
must you have been protruding?
must they have been protruding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not protrude?
must you not protrude?
must she not protrude?
must we not protrude?
must you not protrude?
must they not protrude? 	must I not be protruding?
must you not be protruding?
must she not be protruding?
must we not be protruding?
must you not be protruding?
must they not be protruding? 	must I not have protruded?
must you not have protruded?
must she not have protruded?
must we not have protruded?
must you not have protruded?
must they not have protruded? 	must I not have been protruding?
must you not have been protruding?
must she not have been protruding?
must we not have been protruding?
must you not have been protruding?
must they not have been protruding?