English verb conjugation
CAN CURSE

Regular verb: curse - cursed - cursed

Affirmation

Simple form	V-ing form
I can curse you can curse he can curse we can curse you can curse they can curse	I can be cursing you can be cursing he can be cursing we can be cursing you can be cursing they can be cursing
Perfect	V-ing perfect
I can have cursed you can have cursed he can have cursed we can have cursed you can have cursed they can have cursed	I can have been cursing you can have been cursing he can have been cursing we can have been cursing you can have been cursing they can have been cursing

Negation

Simple form	V-ing form
I cannot curse you cannot curse he cannot curse we cannot curse you cannot curse they cannot curse	I cannot be cursing you cannot be cursing he cannot be cursing we cannot be cursing you cannot be cursing they cannot be cursing
Perfect	V-ing perfect
I cannot have cursed you cannot have cursed he cannot have cursed we cannot have cursed you cannot have cursed they cannot have cursed	I cannot have been cursing you cannot have been cursing he cannot have been cursing we cannot have been cursing you cannot have been cursing they cannot have been cursing

Interrogative form

Simple form	V-ing form
can I curse? can you curse? can he curse? can we curse? can you curse? can they curse?	can I be cursing? can you be cursing? can he be cursing? can we be cursing? can you be cursing? can they be cursing?
Perfect	V-ing perfect
can I have cursed? can you have cursed? can he have cursed? can we have cursed? can you have cursed? can they have cursed?	can I have been cursing? can you have been cursing? can he have been cursing? can we have been cursing? can you have been cursing? can they have been cursing?

Interro-negative form

Simple form	V-ing form
can I not curse? can you not curse? can he not curse? can we not curse? can you not curse? can they not curse?	can I not be cursing? can you not be cursing? can he not be cursing? can we not be cursing? can you not be cursing? can they not be cursing?
Perfect	V-ing perfect
can I not have cursed? can you not have cursed? can he not have cursed? can we not have cursed? can you not have cursed? can they not have cursed?	can I not have been cursing? can you not have been cursing? can he not have been cursing? can we not have been cursing? can you not have been cursing? can they not have been cursing?