English verb conjugation
CAN CRAB

Regular verb: crab - crabbed - crabbed

Affirmation

Simple form	V-ing form
I can crab you can crab she can crab we can crab you can crab they can crab	I can be crabbing you can be crabbing she 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 she 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 she 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 she 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 she 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 she 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 she 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 she crab? can we crab? can you crab? can they crab?	can I be crabbing? can you be crabbing? can she 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 she 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 she 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 she 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 she 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 she 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 she have been crabbing? can't we have been crabbing? can't you have been crabbing? can't they have been crabbing?