can pet
Regular verb: pet - petted- petted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?