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 cannot race you cannot race he cannot race we cannot race you cannot race they cannot race	I cannot be racing you cannot be racing he cannot be racing we cannot be racing you cannot be racing they cannot be racing
Perfect	V-ing perfect
I cannot have raced you cannot have raced he cannot have raced we cannot have raced you cannot have raced they cannot have raced	I cannot have been racing you cannot have been racing he cannot have been racing we cannot have been racing you cannot have been racing they cannot 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 I not race? can you not race? can he not race? can we not race? can you not race? can they not race?	can I not be racing? can you not be racing? can he not be racing? can we not be racing? can you not be racing? can they not be racing?
Perfect	V-ing perfect
can I not have raced? can you not have raced? can he not have raced? can we not have raced? can you not have raced? can they not have raced?	can I not have been racing? can you not have been racing? can he not have been racing? can we not have been racing? can you not have been racing? can they not have been racing?