English verb conjugation
CAN CRAM

Regular verb: cram - crammed - crammed

Affirmation

Simple form	V-ing form
I can cram you can cram he can cram we can cram you can cram they can cram	I can be cramming you can be cramming he can be cramming we can be cramming you can be cramming they can be cramming
Perfect	V-ing perfect
I can have crammed you can have crammed he can have crammed we can have crammed you can have crammed they can have crammed	I can have been cramming you can have been cramming he can have been cramming we can have been cramming you can have been cramming they can have been cramming

Negation

Simple form	V-ing form
I can't cram you can't cram he can't cram we can't cram you can't cram they can't cram	I can't be cramming you can't be cramming he can't be cramming we can't be cramming you can't be cramming they can't be cramming
Perfect	V-ing perfect
I can't have crammed you can't have crammed he can't have crammed we can't have crammed you can't have crammed they can't have crammed	I can't have been cramming you can't have been cramming he can't have been cramming we can't have been cramming you can't have been cramming they can't have been cramming

Interrogative form

Simple form	V-ing form
can I cram? can you cram? can he cram? can we cram? can you cram? can they cram?	can I be cramming? can you be cramming? can he be cramming? can we be cramming? can you be cramming? can they be cramming?
Perfect	V-ing perfect
can I have crammed? can you have crammed? can he have crammed? can we have crammed? can you have crammed? can they have crammed?	can I have been cramming? can you have been cramming? can he have been cramming? can we have been cramming? can you have been cramming? can they have been cramming?

Interro-negative form

Simple form	V-ing form
can't I cram? can't you cram? can't he cram? can't we cram? can't you cram? can't they cram?	can't I be cramming? can't you be cramming? can't he be cramming? can't we be cramming? can't you be cramming? can't they be cramming?
Perfect	V-ing perfect
can't I have crammed? can't you have crammed? can't he have crammed? can't we have crammed? can't you have crammed? can't they have crammed?	can't I have been cramming? can't you have been cramming? can't he have been cramming? can't we have been cramming? can't you have been cramming? can't they have been cramming?