must scuba-dive
Irregular verb: scuba-dive - scuba-dived, scuba-dove- scuba-dived

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must scuba-dive
you must scuba-dive
she must scuba-dive
we must scuba-dive
you must scuba-dive
they must scuba-dive 	I must be scuba-diving
you must be scuba-diving
she must be scuba-diving
we must be scuba-diving
you must be scuba-diving
they must be scuba-diving	I must have scuba-dived
you must have scuba-dived
she must have scuba-dived
we must have scuba-dived
you must have scuba-dived
they must have scuba-dived	I must have been scuba-diving
you must have been scuba-diving
she must have been scuba-diving
we must have been scuba-diving
you must have been scuba-diving
they must have been scuba-diving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not scuba-dive
you must not scuba-dive
she must not scuba-dive
we must not scuba-dive
you must not scuba-dive
they must not scuba-dive 	I must not be scuba-diving
you must not be scuba-diving
she must not be scuba-diving
we must not be scuba-diving
you must not be scuba-diving
they must not be scuba-diving	I must not have scuba-dived
you must not have scuba-dived
she must not have scuba-dived
we must not have scuba-dived
you must not have scuba-dived
they must not have scuba-dived	I must not have been scuba-diving
you must not have been scuba-diving
she must not have been scuba-diving
we must not have been scuba-diving
you must not have been scuba-diving
they must not have been scuba-diving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I scuba-dive?
must you scuba-dive?
must she scuba-dive?
must we scuba-dive?
must you scuba-dive?
must they scuba-dive? 	must I be scuba-diving?
must you be scuba-diving?
must she be scuba-diving?
must we be scuba-diving?
must you be scuba-diving?
must they be scuba-diving? 	must I have scuba-dived?
must you have scuba-dived?
must she have scuba-dived?
must we have scuba-dived?
must you have scuba-dived?
must they have scuba-dived? 	must I have been scuba-diving?
must you have been scuba-diving?
must she have been scuba-diving?
must we have been scuba-diving?
must you have been scuba-diving?
must they have been scuba-diving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not scuba-dive?
must you not scuba-dive?
must she not scuba-dive?
must we not scuba-dive?
must you not scuba-dive?
must they not scuba-dive? 	must I not be scuba-diving?
must you not be scuba-diving?
must she not be scuba-diving?
must we not be scuba-diving?
must you not be scuba-diving?
must they not be scuba-diving? 	must I not have scuba-dived?
must you not have scuba-dived?
must she not have scuba-dived?
must we not have scuba-dived?
must you not have scuba-dived?
must they not have scuba-dived? 	must I not have been scuba-diving?
must you not have been scuba-diving?
must she not have been scuba-diving?
must we not have been scuba-diving?
must you not have been scuba-diving?
must they not have been scuba-diving?