English verb conjugation
CAN TUB

Regular verb: tub - tubbed - tubbed

Affirmation

Simple form	V-ing form
I can tub you can tub he can tub we can tub you can tub they can tub	I can be tubbing you can be tubbing he can be tubbing we can be tubbing you can be tubbing they can be tubbing
Perfect	V-ing perfect
I can have tubbed you can have tubbed he can have tubbed we can have tubbed you can have tubbed they can have tubbed	I can have been tubbing you can have been tubbing he can have been tubbing we can have been tubbing you can have been tubbing they can have been tubbing

Negation

Simple form	V-ing form
I cannot tub you cannot tub he cannot tub we cannot tub you cannot tub they cannot tub	I cannot be tubbing you cannot be tubbing he cannot be tubbing we cannot be tubbing you cannot be tubbing they cannot be tubbing
Perfect	V-ing perfect
I cannot have tubbed you cannot have tubbed he cannot have tubbed we cannot have tubbed you cannot have tubbed they cannot have tubbed	I cannot have been tubbing you cannot have been tubbing he cannot have been tubbing we cannot have been tubbing you cannot have been tubbing they cannot have been tubbing

Interrogative form

Simple form	V-ing form
can I tub? can you tub? can he tub? can we tub? can you tub? can they tub?	can I be tubbing? can you be tubbing? can he be tubbing? can we be tubbing? can you be tubbing? can they be tubbing?
Perfect	V-ing perfect
can I have tubbed? can you have tubbed? can he have tubbed? can we have tubbed? can you have tubbed? can they have tubbed?	can I have been tubbing? can you have been tubbing? can he have been tubbing? can we have been tubbing? can you have been tubbing? can they have been tubbing?

Interro-negative form

Simple form	V-ing form
can I not tub? can you not tub? can he not tub? can we not tub? can you not tub? can they not tub?	can I not be tubbing? can you not be tubbing? can he not be tubbing? can we not be tubbing? can you not be tubbing? can they not be tubbing?
Perfect	V-ing perfect
can I not have tubbed? can you not have tubbed? can he not have tubbed? can we not have tubbed? can you not have tubbed? can they not have tubbed?	can I not have been tubbing? can you not have been tubbing? can he not have been tubbing? can we not have been tubbing? can you not have been tubbing? can they not have been tubbing?