English verb conjugation
CAN CRAB

Regular verb: crab - crabbed - crabbed

Affirmation

Simple form	V-ing form
I can crab you can crab he can crab we can crab you can crab they can crab	I can be crabbing you can be crabbing he can be crabbing we can be crabbing you can be crabbing they can be crabbing
Perfect	V-ing perfect
I can have crabbed you can have crabbed he can have crabbed we can have crabbed you can have crabbed they can have crabbed	I can have been crabbing you can have been crabbing he can have been crabbing we can have been crabbing you can have been crabbing they can have been crabbing

Negation

Simple form	V-ing form
I can't crab you can't crab he can't crab we can't crab you can't crab they can't crab	I can't be crabbing you can't be crabbing he can't be crabbing we can't be crabbing you can't be crabbing they can't be crabbing
Perfect	V-ing perfect
I can't have crabbed you can't have crabbed he can't have crabbed we can't have crabbed you can't have crabbed they can't have crabbed	I can't have been crabbing you can't have been crabbing he can't have been crabbing we can't have been crabbing you can't have been crabbing they can't have been crabbing

Interrogative form

Simple form	V-ing form
can I crab? can you crab? can he crab? can we crab? can you crab? can they crab?	can I be crabbing? can you be crabbing? can he be crabbing? can we be crabbing? can you be crabbing? can they be crabbing?
Perfect	V-ing perfect
can I have crabbed? can you have crabbed? can he have crabbed? can we have crabbed? can you have crabbed? can they have crabbed?	can I have been crabbing? can you have been crabbing? can he have been crabbing? can we have been crabbing? can you have been crabbing? can they have been crabbing?

Interro-negative form

Simple form	V-ing form
can't I crab? can't you crab? can't he crab? can't we crab? can't you crab? can't they crab?	can't I be crabbing? can't you be crabbing? can't he be crabbing? can't we be crabbing? can't you be crabbing? can't they be crabbing?
Perfect	V-ing perfect
can't I have crabbed? can't you have crabbed? can't he have crabbed? can't we have crabbed? can't you have crabbed? can't they have crabbed?	can't I have been crabbing? can't you have been crabbing? can't he have been crabbing? can't we have been crabbing? can't you have been crabbing? can't they have been crabbing?