English verb conjugation
CAN HELP

Regular verb: help - helped - helped

Affirmation

Simple form	V-ing form
I can help you can help he can help we can help you can help they can help	I can be helping you can be helping he can be helping we can be helping you can be helping they can be helping
Perfect	V-ing perfect
I can have helped you can have helped he can have helped we can have helped you can have helped they can have helped	I can have been helping you can have been helping he can have been helping we can have been helping you can have been helping they can have been helping

Negation

Simple form	V-ing form
I can't help you can't help he can't help we can't help you can't help they can't help	I can't be helping you can't be helping he can't be helping we can't be helping you can't be helping they can't be helping
Perfect	V-ing perfect
I can't have helped you can't have helped he can't have helped we can't have helped you can't have helped they can't have helped	I can't have been helping you can't have been helping he can't have been helping we can't have been helping you can't have been helping they can't have been helping

Interrogative form

Simple form	V-ing form
can I help? can you help? can he help? can we help? can you help? can they help?	can I be helping? can you be helping? can he be helping? can we be helping? can you be helping? can they be helping?
Perfect	V-ing perfect
can I have helped? can you have helped? can he have helped? can we have helped? can you have helped? can they have helped?	can I have been helping? can you have been helping? can he have been helping? can we have been helping? can you have been helping? can they have been helping?

Interro-negative form

Simple form	V-ing form
can't I help? can't you help? can't he help? can't we help? can't you help? can't they help?	can't I be helping? can't you be helping? can't he be helping? can't we be helping? can't you be helping? can't they be helping?
Perfect	V-ing perfect
can't I have helped? can't you have helped? can't he have helped? can't we have helped? can't you have helped? can't they have helped?	can't I have been helping? can't you have been helping? can't he have been helping? can't we have been helping? can't you have been helping? can't they have been helping?