English verb conjugation
CAN FLUB

Regular verb: flub - flubed - flubed

Affirmation

Simple form	V-ing form
I can flub you can flub he can flub we can flub you can flub they can flub	I can be flubing you can be flubing he can be flubing we can be flubing you can be flubing they can be flubing
Perfect	V-ing perfect
I can have flubed you can have flubed he can have flubed we can have flubed you can have flubed they can have flubed	I can have been flubing you can have been flubing he can have been flubing we can have been flubing you can have been flubing they can have been flubing

Negation

Simple form	V-ing form
I can't flub you can't flub he can't flub we can't flub you can't flub they can't flub	I can't be flubing you can't be flubing he can't be flubing we can't be flubing you can't be flubing they can't be flubing
Perfect	V-ing perfect
I can't have flubed you can't have flubed he can't have flubed we can't have flubed you can't have flubed they can't have flubed	I can't have been flubing you can't have been flubing he can't have been flubing we can't have been flubing you can't have been flubing they can't have been flubing

Interrogative form

Simple form	V-ing form
can I flub? can you flub? can he flub? can we flub? can you flub? can they flub?	can I be flubing? can you be flubing? can he be flubing? can we be flubing? can you be flubing? can they be flubing?
Perfect	V-ing perfect
can I have flubed? can you have flubed? can he have flubed? can we have flubed? can you have flubed? can they have flubed?	can I have been flubing? can you have been flubing? can he have been flubing? can we have been flubing? can you have been flubing? can they have been flubing?

Interro-negative form

Simple form	V-ing form
can't I flub? can't you flub? can't he flub? can't we flub? can't you flub? can't they flub?	can't I be flubing? can't you be flubing? can't he be flubing? can't we be flubing? can't you be flubing? can't they be flubing?
Perfect	V-ing perfect
can't I have flubed? can't you have flubed? can't he have flubed? can't we have flubed? can't you have flubed? can't they have flubed?	can't I have been flubing? can't you have been flubing? can't he have been flubing? can't we have been flubing? can't you have been flubing? can't they have been flubing?