English verb conjugation
CAN SOB

Regular verb: sob - sobbed - sobbed

Affirmation

Simple form	V-ing form
I can sob you can sob he can sob we can sob you can sob they can sob	I can be sobbing you can be sobbing he can be sobbing we can be sobbing you can be sobbing they can be sobbing
Perfect	V-ing perfect
I can have sobbed you can have sobbed he can have sobbed we can have sobbed you can have sobbed they can have sobbed	I can have been sobbing you can have been sobbing he can have been sobbing we can have been sobbing you can have been sobbing they can have been sobbing

Negation

Simple form	V-ing form
I can't sob you can't sob he can't sob we can't sob you can't sob they can't sob	I can't be sobbing you can't be sobbing he can't be sobbing we can't be sobbing you can't be sobbing they can't be sobbing
Perfect	V-ing perfect
I can't have sobbed you can't have sobbed he can't have sobbed we can't have sobbed you can't have sobbed they can't have sobbed	I can't have been sobbing you can't have been sobbing he can't have been sobbing we can't have been sobbing you can't have been sobbing they can't have been sobbing

Interrogative form

Simple form	V-ing form
can I sob? can you sob? can he sob? can we sob? can you sob? can they sob?	can I be sobbing? can you be sobbing? can he be sobbing? can we be sobbing? can you be sobbing? can they be sobbing?
Perfect	V-ing perfect
can I have sobbed? can you have sobbed? can he have sobbed? can we have sobbed? can you have sobbed? can they have sobbed?	can I have been sobbing? can you have been sobbing? can he have been sobbing? can we have been sobbing? can you have been sobbing? can they have been sobbing?

Interro-negative form

Simple form	V-ing form
can't I sob? can't you sob? can't he sob? can't we sob? can't you sob? can't they sob?	can't I be sobbing? can't you be sobbing? can't he be sobbing? can't we be sobbing? can't you be sobbing? can't they be sobbing?
Perfect	V-ing perfect
can't I have sobbed? can't you have sobbed? can't he have sobbed? can't we have sobbed? can't you have sobbed? can't they have sobbed?	can't I have been sobbing? can't you have been sobbing? can't he have been sobbing? can't we have been sobbing? can't you have been sobbing? can't they have been sobbing?