English verb conjugation
CAN STUB

Regular verb: stub - stubbed - stubbed

Affirmation

Simple form	V-ing form
I can stub you can stub she can stub we can stub you can stub they can stub	I can be stubbing you can be stubbing she can be stubbing we can be stubbing you can be stubbing they can be stubbing
Perfect	V-ing perfect
I can have stubbed you can have stubbed she can have stubbed we can have stubbed you can have stubbed they can have stubbed	I can have been stubbing you can have been stubbing she can have been stubbing we can have been stubbing you can have been stubbing they can have been stubbing

Negation

Simple form	V-ing form
I can't stub you can't stub she can't stub we can't stub you can't stub they can't stub	I can't be stubbing you can't be stubbing she can't be stubbing we can't be stubbing you can't be stubbing they can't be stubbing
Perfect	V-ing perfect
I can't have stubbed you can't have stubbed she can't have stubbed we can't have stubbed you can't have stubbed they can't have stubbed	I can't have been stubbing you can't have been stubbing she can't have been stubbing we can't have been stubbing you can't have been stubbing they can't have been stubbing

Interrogative form

Simple form	V-ing form
can I stub? can you stub? can she stub? can we stub? can you stub? can they stub?	can I be stubbing? can you be stubbing? can she be stubbing? can we be stubbing? can you be stubbing? can they be stubbing?
Perfect	V-ing perfect
can I have stubbed? can you have stubbed? can she have stubbed? can we have stubbed? can you have stubbed? can they have stubbed?	can I have been stubbing? can you have been stubbing? can she have been stubbing? can we have been stubbing? can you have been stubbing? can they have been stubbing?

Interro-negative form

Simple form	V-ing form
can't I stub? can't you stub? can't she stub? can't we stub? can't you stub? can't they stub?	can't I be stubbing? can't you be stubbing? can't she be stubbing? can't we be stubbing? can't you be stubbing? can't they be stubbing?
Perfect	V-ing perfect
can't I have stubbed? can't you have stubbed? can't she have stubbed? can't we have stubbed? can't you have stubbed? can't they have stubbed?	can't I have been stubbing? can't you have been stubbing? can't she have been stubbing? can't we have been stubbing? can't you have been stubbing? can't they have been stubbing?