English verb conjugation
CAN DAM

Regular verb: dam - dammed - dammed

Affirmation

Simple form	V-ing form
I can dam you can dam he can dam we can dam you can dam they can dam	I can be damming you can be damming he can be damming we can be damming you can be damming they can be damming
Perfect	V-ing perfect
I can have dammed you can have dammed he can have dammed we can have dammed you can have dammed they can have dammed	I can have been damming you can have been damming he can have been damming we can have been damming you can have been damming they can have been damming

Negation

Simple form	V-ing form
I can't dam you can't dam he can't dam we can't dam you can't dam they can't dam	I can't be damming you can't be damming he can't be damming we can't be damming you can't be damming they can't be damming
Perfect	V-ing perfect
I can't have dammed you can't have dammed he can't have dammed we can't have dammed you can't have dammed they can't have dammed	I can't have been damming you can't have been damming he can't have been damming we can't have been damming you can't have been damming they can't have been damming

Interrogative form

Simple form	V-ing form
can I dam? can you dam? can he dam? can we dam? can you dam? can they dam?	can I be damming? can you be damming? can he be damming? can we be damming? can you be damming? can they be damming?
Perfect	V-ing perfect
can I have dammed? can you have dammed? can he have dammed? can we have dammed? can you have dammed? can they have dammed?	can I have been damming? can you have been damming? can he have been damming? can we have been damming? can you have been damming? can they have been damming?

Interro-negative form

Simple form	V-ing form
can't I dam? can't you dam? can't he dam? can't we dam? can't you dam? can't they dam?	can't I be damming? can't you be damming? can't he be damming? can't we be damming? can't you be damming? can't they be damming?
Perfect	V-ing perfect
can't I have dammed? can't you have dammed? can't he have dammed? can't we have dammed? can't you have dammed? can't they have dammed?	can't I have been damming? can't you have been damming? can't he have been damming? can't we have been damming? can't you have been damming? can't they have been damming?