must scuba
Regular verb: scuba - scubaed- scubaed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must scuba
you must scuba
he must scuba
we must scuba
you must scuba
they must scuba 	I must be scubaing
you must be scubaing
he must be scubaing
we must be scubaing
you must be scubaing
they must be scubaing	I must have scubaed
you must have scubaed
he must have scubaed
we must have scubaed
you must have scubaed
they must have scubaed	I must have been scubaing
you must have been scubaing
he must have been scubaing
we must have been scubaing
you must have been scubaing
they must have been scubaing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not scuba
you must not scuba
he must not scuba
we must not scuba
you must not scuba
they must not scuba 	I must not be scubaing
you must not be scubaing
he must not be scubaing
we must not be scubaing
you must not be scubaing
they must not be scubaing	I must not have scubaed
you must not have scubaed
he must not have scubaed
we must not have scubaed
you must not have scubaed
they must not have scubaed	I must not have been scubaing
you must not have been scubaing
he must not have been scubaing
we must not have been scubaing
you must not have been scubaing
they must not have been scubaing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I scuba?
must you scuba?
must he scuba?
must we scuba?
must you scuba?
must they scuba? 	must I be scubaing?
must you be scubaing?
must he be scubaing?
must we be scubaing?
must you be scubaing?
must they be scubaing? 	must I have scubaed?
must you have scubaed?
must he have scubaed?
must we have scubaed?
must you have scubaed?
must they have scubaed? 	must I have been scubaing?
must you have been scubaing?
must he have been scubaing?
must we have been scubaing?
must you have been scubaing?
must they have been scubaing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not scuba?
must you not scuba?
must he not scuba?
must we not scuba?
must you not scuba?
must they not scuba? 	must I not be scubaing?
must you not be scubaing?
must he not be scubaing?
must we not be scubaing?
must you not be scubaing?
must they not be scubaing? 	must I not have scubaed?
must you not have scubaed?
must he not have scubaed?
must we not have scubaed?
must you not have scubaed?
must they not have scubaed? 	must I not have been scubaing?
must you not have been scubaing?
must he not have been scubaing?
must we not have been scubaing?
must you not have been scubaing?
must they not have been scubaing?