English verb conjugation
CAN HUM

Regular verb: hum - humed - humed

Affirmation

Simple form	V-ing form
I can hum you can hum he can hum we can hum you can hum they can hum	I can be huming you can be huming he can be huming we can be huming you can be huming they can be huming
Perfect	V-ing perfect
I can have humed you can have humed he can have humed we can have humed you can have humed they can have humed	I can have been huming you can have been huming he can have been huming we can have been huming you can have been huming they can have been huming

Negation

Simple form	V-ing form
I can't hum you can't hum he can't hum we can't hum you can't hum they can't hum	I can't be huming you can't be huming he can't be huming we can't be huming you can't be huming they can't be huming
Perfect	V-ing perfect
I can't have humed you can't have humed he can't have humed we can't have humed you can't have humed they can't have humed	I can't have been huming you can't have been huming he can't have been huming we can't have been huming you can't have been huming they can't have been huming

Interrogative form

Simple form	V-ing form
can I hum? can you hum? can he hum? can we hum? can you hum? can they hum?	can I be huming? can you be huming? can he be huming? can we be huming? can you be huming? can they be huming?
Perfect	V-ing perfect
can I have humed? can you have humed? can he have humed? can we have humed? can you have humed? can they have humed?	can I have been huming? can you have been huming? can he have been huming? can we have been huming? can you have been huming? can they have been huming?

Interro-negative form

Simple form	V-ing form
can't I hum? can't you hum? can't he hum? can't we hum? can't you hum? can't they hum?	can't I be huming? can't you be huming? can't he be huming? can't we be huming? can't you be huming? can't they be huming?
Perfect	V-ing perfect
can't I have humed? can't you have humed? can't he have humed? can't we have humed? can't you have humed? can't they have humed?	can't I have been huming? can't you have been huming? can't he have been huming? can't we have been huming? can't you have been huming? can't they have been huming?