English verb conjugation
CAN RACE

Regular verb: race - raced - raced

Affirmation

Simple form	V-ing form
I can race you can race she can race we can race you can race they can race	I can be racing you can be racing she 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 she 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 she 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 she 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 she 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 she 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 she 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 she race? can we race? can you race? can they race?	can I be racing? can you be racing? can she 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 she 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 she 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 she 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 she 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 she 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 she have been racing? can't we have been racing? can't you have been racing? can't they have been racing?