English verb conjugation
CAN BOB

Regular verb: bob - bobbed - bobbed

Affirmation

Simple form	V-ing form
I can bob you can bob he can bob we can bob you can bob they can bob	I can be bobbing you can be bobbing he can be bobbing we can be bobbing you can be bobbing they can be bobbing
Perfect	V-ing perfect
I can have bobbed you can have bobbed he can have bobbed we can have bobbed you can have bobbed they can have bobbed	I can have been bobbing you can have been bobbing he can have been bobbing we can have been bobbing you can have been bobbing they can have been bobbing

Negation

Simple form	V-ing form
I can't bob you can't bob he can't bob we can't bob you can't bob they can't bob	I can't be bobbing you can't be bobbing he can't be bobbing we can't be bobbing you can't be bobbing they can't be bobbing
Perfect	V-ing perfect
I can't have bobbed you can't have bobbed he can't have bobbed we can't have bobbed you can't have bobbed they can't have bobbed	I can't have been bobbing you can't have been bobbing he can't have been bobbing we can't have been bobbing you can't have been bobbing they can't have been bobbing

Interrogative form

Simple form	V-ing form
can I bob? can you bob? can he bob? can we bob? can you bob? can they bob?	can I be bobbing? can you be bobbing? can he be bobbing? can we be bobbing? can you be bobbing? can they be bobbing?
Perfect	V-ing perfect
can I have bobbed? can you have bobbed? can he have bobbed? can we have bobbed? can you have bobbed? can they have bobbed?	can I have been bobbing? can you have been bobbing? can he have been bobbing? can we have been bobbing? can you have been bobbing? can they have been bobbing?

Interro-negative form

Simple form	V-ing form
can't I bob? can't you bob? can't he bob? can't we bob? can't you bob? can't they bob?	can't I be bobbing? can't you be bobbing? can't he be bobbing? can't we be bobbing? can't you be bobbing? can't they be bobbing?
Perfect	V-ing perfect
can't I have bobbed? can't you have bobbed? can't he have bobbed? can't we have bobbed? can't you have bobbed? can't they have bobbed?	can't I have been bobbing? can't you have been bobbing? can't he have been bobbing? can't we have been bobbing? can't you have been bobbing? can't they have been bobbing?