must increase
Regular verb: increase - increased- increased

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must increase
you must increase
he must increase
we must increase
you must increase
they must increase 	I must be increasing
you must be increasing
he must be increasing
we must be increasing
you must be increasing
they must be increasing	I must have increased
you must have increased
he must have increased
we must have increased
you must have increased
they must have increased	I must have been increasing
you must have been increasing
he must have been increasing
we must have been increasing
you must have been increasing
they must have been increasing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not increase
you must not increase
he must not increase
we must not increase
you must not increase
they must not increase 	I must not be increasing
you must not be increasing
he must not be increasing
we must not be increasing
you must not be increasing
they must not be increasing	I must not have increased
you must not have increased
he must not have increased
we must not have increased
you must not have increased
they must not have increased	I must not have been increasing
you must not have been increasing
he must not have been increasing
we must not have been increasing
you must not have been increasing
they must not have been increasing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I increase?
must you increase?
must he increase?
must we increase?
must you increase?
must they increase? 	must I be increasing?
must you be increasing?
must he be increasing?
must we be increasing?
must you be increasing?
must they be increasing? 	must I have increased?
must you have increased?
must he have increased?
must we have increased?
must you have increased?
must they have increased? 	must I have been increasing?
must you have been increasing?
must he have been increasing?
must we have been increasing?
must you have been increasing?
must they have been increasing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not increase?
must you not increase?
must he not increase?
must we not increase?
must you not increase?
must they not increase? 	must I not be increasing?
must you not be increasing?
must he not be increasing?
must we not be increasing?
must you not be increasing?
must they not be increasing? 	must I not have increased?
must you not have increased?
must he not have increased?
must we not have increased?
must you not have increased?
must they not have increased? 	must I not have been increasing?
must you not have been increasing?
must he not have been increasing?
must we not have been increasing?
must you not have been increasing?
must they not have been increasing?