must pet
Regular verb: pet - petted- petted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must pet
you must pet
she must pet
we must pet
you must pet
they must pet 	I must be petting
you must be petting
she must be petting
we must be petting
you must be petting
they must be petting	I must have petted
you must have petted
she must have petted
we must have petted
you must have petted
they must have petted	I must have been petting
you must have been petting
she must have been petting
we must have been petting
you must have been petting
they must have been petting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not pet
you must not pet
she must not pet
we must not pet
you must not pet
they must not pet 	I must not be petting
you must not be petting
she must not be petting
we must not be petting
you must not be petting
they must not be petting	I must not have petted
you must not have petted
she must not have petted
we must not have petted
you must not have petted
they must not have petted	I must not have been petting
you must not have been petting
she must not have been petting
we must not have been petting
you must not have been petting
they must not have been petting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I pet?
must you pet?
must she pet?
must we pet?
must you pet?
must they pet? 	must I be petting?
must you be petting?
must she be petting?
must we be petting?
must you be petting?
must they be petting? 	must I have petted?
must you have petted?
must she have petted?
must we have petted?
must you have petted?
must they have petted? 	must I have been petting?
must you have been petting?
must she have been petting?
must we have been petting?
must you have been petting?
must they have been petting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not pet?
must you not pet?
must she not pet?
must we not pet?
must you not pet?
must they not pet? 	must I not be petting?
must you not be petting?
must she not be petting?
must we not be petting?
must you not be petting?
must they not be petting? 	must I not have petted?
must you not have petted?
must she not have petted?
must we not have petted?
must you not have petted?
must they not have petted? 	must I not have been petting?
must you not have been petting?
must she not have been petting?
must we not have been petting?
must you not have been petting?
must they not have been petting?