must hap
Regular verb: hap - haped- haped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must hap
you must hap
she must hap
we must hap
you must hap
they must hap 	I must be haping
you must be haping
she must be haping
we must be haping
you must be haping
they must be haping	I must have haped
you must have haped
she must have haped
we must have haped
you must have haped
they must have haped	I must have been haping
you must have been haping
she must have been haping
we must have been haping
you must have been haping
they must have been haping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't hap
you mustn't hap
she mustn't hap
we mustn't hap
you mustn't hap
they mustn't hap 	I mustn't be haping
you mustn't be haping
she mustn't be haping
we mustn't be haping
you mustn't be haping
they mustn't be haping	I mustn't have haped
you mustn't have haped
she mustn't have haped
we mustn't have haped
you mustn't have haped
they mustn't have haped	I mustn't have been haping
you mustn't have been haping
she mustn't have been haping
we mustn't have been haping
you mustn't have been haping
they mustn't have been haping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I hap?
must you hap?
must she hap?
must we hap?
must you hap?
must they hap? 	must I be haping?
must you be haping?
must she be haping?
must we be haping?
must you be haping?
must they be haping? 	must I have haped?
must you have haped?
must she have haped?
must we have haped?
must you have haped?
must they have haped? 	must I have been haping?
must you have been haping?
must she have been haping?
must we have been haping?
must you have been haping?
must they have been haping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I hap?
mustn't you hap?
mustn't she hap?
mustn't we hap?
mustn't you hap?
mustn't they hap? 	mustn't I be haping?
mustn't you be haping?
mustn't she be haping?
mustn't we be haping?
mustn't you be haping?
mustn't they be haping? 	mustn't I have haped?
mustn't you have haped?
mustn't she have haped?
mustn't we have haped?
mustn't you have haped?
mustn't they have haped? 	mustn't I have been haping?
mustn't you have been haping?
mustn't she have been haping?
mustn't we have been haping?
mustn't you have been haping?
mustn't they have been haping?