English verb conjugation
MUST PET

Regular verb: pet - petted - petted

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
I mustn't pet you mustn't pet she mustn't pet we mustn't pet you mustn't pet they mustn't pet	I mustn't be petting you mustn't be petting she mustn't be petting we mustn't be petting you mustn't be petting they mustn't be petting
Perfect	V-ing perfect
I mustn't have petted you mustn't have petted she mustn't have petted we mustn't have petted you mustn't have petted they mustn't have petted	I mustn't have been petting you mustn't have been petting she mustn't have been petting we mustn't have been petting you mustn't have been petting they mustn't have been petting

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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
mustn't I pet? mustn't you pet? mustn't she pet? mustn't we pet? mustn't you pet? mustn't they pet?	mustn't I be petting? mustn't you be petting? mustn't she be petting? mustn't we be petting? mustn't you be petting? mustn't they be petting?
Perfect	V-ing perfect
mustn't I have petted? mustn't you have petted? mustn't she have petted? mustn't we have petted? mustn't you have petted? mustn't they have petted?	mustn't I have been petting? mustn't you have been petting? mustn't she have been petting? mustn't we have been petting? mustn't you have been petting? mustn't they have been petting?