English verb conjugation
CAN ROLLERBLADE

Regular verb: rollerblade - rollerbladed - rollerbladed

Affirmation

Simple form	V-ing form
I can rollerblade you can rollerblade he can rollerblade we can rollerblade you can rollerblade they can rollerblade	I can be rollerblading you can be rollerblading he can be rollerblading we can be rollerblading you can be rollerblading they can be rollerblading
Perfect	V-ing perfect
I can have rollerbladed you can have rollerbladed he can have rollerbladed we can have rollerbladed you can have rollerbladed they can have rollerbladed	I can have been rollerblading you can have been rollerblading he can have been rollerblading we can have been rollerblading you can have been rollerblading they can have been rollerblading

Negation

Simple form	V-ing form
I cannot rollerblade you cannot rollerblade he cannot rollerblade we cannot rollerblade you cannot rollerblade they cannot rollerblade	I cannot be rollerblading you cannot be rollerblading he cannot be rollerblading we cannot be rollerblading you cannot be rollerblading they cannot be rollerblading
Perfect	V-ing perfect
I cannot have rollerbladed you cannot have rollerbladed he cannot have rollerbladed we cannot have rollerbladed you cannot have rollerbladed they cannot have rollerbladed	I cannot have been rollerblading you cannot have been rollerblading he cannot have been rollerblading we cannot have been rollerblading you cannot have been rollerblading they cannot have been rollerblading

Interrogative form

Simple form	V-ing form
can I rollerblade? can you rollerblade? can he rollerblade? can we rollerblade? can you rollerblade? can they rollerblade?	can I be rollerblading? can you be rollerblading? can he be rollerblading? can we be rollerblading? can you be rollerblading? can they be rollerblading?
Perfect	V-ing perfect
can I have rollerbladed? can you have rollerbladed? can he have rollerbladed? can we have rollerbladed? can you have rollerbladed? can they have rollerbladed?	can I have been rollerblading? can you have been rollerblading? can he have been rollerblading? can we have been rollerblading? can you have been rollerblading? can they have been rollerblading?

Interro-negative form

Simple form	V-ing form
can I not rollerblade? can you not rollerblade? can he not rollerblade? can we not rollerblade? can you not rollerblade? can they not rollerblade?	can I not be rollerblading? can you not be rollerblading? can he not be rollerblading? can we not be rollerblading? can you not be rollerblading? can they not be rollerblading?
Perfect	V-ing perfect
can I not have rollerbladed? can you not have rollerbladed? can he not have rollerbladed? can we not have rollerbladed? can you not have rollerbladed? can they not have rollerbladed?	can I not have been rollerblading? can you not have been rollerblading? can he not have been rollerblading? can we not have been rollerblading? can you not have been rollerblading? can they not have been rollerblading?