must gap
Regular verb: gap - gaped- gaped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must gap
you must gap
she must gap
we must gap
you must gap
they must gap 	I must be gaping
you must be gaping
she must be gaping
we must be gaping
you must be gaping
they must be gaping	I must have gaped
you must have gaped
she must have gaped
we must have gaped
you must have gaped
they must have gaped	I must have been gaping
you must have been gaping
she must have been gaping
we must have been gaping
you must have been gaping
they must have been gaping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't gap
you mustn't gap
she mustn't gap
we mustn't gap
you mustn't gap
they mustn't gap 	I mustn't be gaping
you mustn't be gaping
she mustn't be gaping
we mustn't be gaping
you mustn't be gaping
they mustn't be gaping	I mustn't have gaped
you mustn't have gaped
she mustn't have gaped
we mustn't have gaped
you mustn't have gaped
they mustn't have gaped	I mustn't have been gaping
you mustn't have been gaping
she mustn't have been gaping
we mustn't have been gaping
you mustn't have been gaping
they mustn't have been gaping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I gap?
must you gap?
must she gap?
must we gap?
must you gap?
must they gap? 	must I be gaping?
must you be gaping?
must she be gaping?
must we be gaping?
must you be gaping?
must they be gaping? 	must I have gaped?
must you have gaped?
must she have gaped?
must we have gaped?
must you have gaped?
must they have gaped? 	must I have been gaping?
must you have been gaping?
must she have been gaping?
must we have been gaping?
must you have been gaping?
must they have been gaping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I gap?
mustn't you gap?
mustn't she gap?
mustn't we gap?
mustn't you gap?
mustn't they gap? 	mustn't I be gaping?
mustn't you be gaping?
mustn't she be gaping?
mustn't we be gaping?
mustn't you be gaping?
mustn't they be gaping? 	mustn't I have gaped?
mustn't you have gaped?
mustn't she have gaped?
mustn't we have gaped?
mustn't you have gaped?
mustn't they have gaped? 	mustn't I have been gaping?
mustn't you have been gaping?
mustn't she have been gaping?
mustn't we have been gaping?
mustn't you have been gaping?
mustn't they have been gaping?