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 cannot crab you cannot crab she cannot crab we cannot crab you cannot crab they cannot crab	I cannot be crabbing you cannot be crabbing she cannot be crabbing we cannot be crabbing you cannot be crabbing they cannot be crabbing
Perfect	V-ing perfect
I cannot have crabbed you cannot have crabbed she cannot have crabbed we cannot have crabbed you cannot have crabbed they cannot have crabbed	I cannot have been crabbing you cannot have been crabbing she cannot have been crabbing we cannot have been crabbing you cannot have been crabbing they cannot 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 I not crab? can you not crab? can she not crab? can we not crab? can you not crab? can they not crab?	can I not be crabbing? can you not be crabbing? can she not be crabbing? can we not be crabbing? can you not be crabbing? can they not be crabbing?
Perfect	V-ing perfect
can I not have crabbed? can you not have crabbed? can she not have crabbed? can we not have crabbed? can you not have crabbed? can they not have crabbed?	can I not have been crabbing? can you not have been crabbing? can she not have been crabbing? can we not have been crabbing? can you not have been crabbing? can they not have been crabbing?