English verb conjugation
CAN PET

Regular verb: pet - petted - petted

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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