English verb conjugation
CAN RACE

Regular verb: race - raced - raced

Affirmation

Simple form	V-ing form
I can race you can race he can race we can race you can race they can race	I can be racing you can be racing he can be racing we can be racing you can be racing they can be racing
Perfect	V-ing perfect
I can have raced you can have raced he can have raced we can have raced you can have raced they can have raced	I can have been racing you can have been racing he can have been racing we can have been racing you can have been racing they can have been racing

Negation

Simple form	V-ing form
I can't race you can't race he can't race we can't race you can't race they can't race	I can't be racing you can't be racing he can't be racing we can't be racing you can't be racing they can't be racing
Perfect	V-ing perfect
I can't have raced you can't have raced he can't have raced we can't have raced you can't have raced they can't have raced	I can't have been racing you can't have been racing he can't have been racing we can't have been racing you can't have been racing they can't have been racing

Interrogative form

Simple form	V-ing form
can I race? can you race? can he race? can we race? can you race? can they race?	can I be racing? can you be racing? can he be racing? can we be racing? can you be racing? can they be racing?
Perfect	V-ing perfect
can I have raced? can you have raced? can he have raced? can we have raced? can you have raced? can they have raced?	can I have been racing? can you have been racing? can he have been racing? can we have been racing? can you have been racing? can they have been racing?

Interro-negative form

Simple form	V-ing form
can't I race? can't you race? can't he race? can't we race? can't you race? can't they race?	can't I be racing? can't you be racing? can't he be racing? can't we be racing? can't you be racing? can't they be racing?
Perfect	V-ing perfect
can't I have raced? can't you have raced? can't he have raced? can't we have raced? can't you have raced? can't they have raced?	can't I have been racing? can't you have been racing? can't he have been racing? can't we have been racing? can't you have been racing? can't they have been racing?