English verb conjugation
CAN SKATE

Regular verb: skate - skated - skated

Affirmation

Simple form	V-ing form
I can skate you can skate he can skate we can skate you can skate they can skate	I can be skating you can be skating he can be skating we can be skating you can be skating they can be skating
Perfect	V-ing perfect
I can have skated you can have skated he can have skated we can have skated you can have skated they can have skated	I can have been skating you can have been skating he can have been skating we can have been skating you can have been skating they can have been skating

Negation

Simple form	V-ing form
I cannot skate you cannot skate he cannot skate we cannot skate you cannot skate they cannot skate	I cannot be skating you cannot be skating he cannot be skating we cannot be skating you cannot be skating they cannot be skating
Perfect	V-ing perfect
I cannot have skated you cannot have skated he cannot have skated we cannot have skated you cannot have skated they cannot have skated	I cannot have been skating you cannot have been skating he cannot have been skating we cannot have been skating you cannot have been skating they cannot have been skating

Interrogative form

Simple form	V-ing form
can I skate? can you skate? can he skate? can we skate? can you skate? can they skate?	can I be skating? can you be skating? can he be skating? can we be skating? can you be skating? can they be skating?
Perfect	V-ing perfect
can I have skated? can you have skated? can he have skated? can we have skated? can you have skated? can they have skated?	can I have been skating? can you have been skating? can he have been skating? can we have been skating? can you have been skating? can they have been skating?

Interro-negative form

Simple form	V-ing form
can I not skate? can you not skate? can he not skate? can we not skate? can you not skate? can they not skate?	can I not be skating? can you not be skating? can he not be skating? can we not be skating? can you not be skating? can they not be skating?
Perfect	V-ing perfect
can I not have skated? can you not have skated? can he not have skated? can we not have skated? can you not have skated? can they not have skated?	can I not have been skating? can you not have been skating? can he not have been skating? can we not have been skating? can you not have been skating? can they not have been skating?