English verb conjugation
MUST PET

Regular verb: pet - petted - petted

Affirmation

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