English verb conjugation
CAN EXERCISE

Regular verb: exercise - exercised - exercised

Affirmation

Simple form	V-ing form
I can exercise you can exercise he can exercise we can exercise you can exercise they can exercise	I can be exercising you can be exercising he can be exercising we can be exercising you can be exercising they can be exercising
Perfect	V-ing perfect
I can have exercised you can have exercised he can have exercised we can have exercised you can have exercised they can have exercised	I can have been exercising you can have been exercising he can have been exercising we can have been exercising you can have been exercising they can have been exercising

Negation

Simple form	V-ing form
I cannot exercise you cannot exercise he cannot exercise we cannot exercise you cannot exercise they cannot exercise	I cannot be exercising you cannot be exercising he cannot be exercising we cannot be exercising you cannot be exercising they cannot be exercising
Perfect	V-ing perfect
I cannot have exercised you cannot have exercised he cannot have exercised we cannot have exercised you cannot have exercised they cannot have exercised	I cannot have been exercising you cannot have been exercising he cannot have been exercising we cannot have been exercising you cannot have been exercising they cannot have been exercising

Interrogative form

Simple form	V-ing form
can I exercise? can you exercise? can he exercise? can we exercise? can you exercise? can they exercise?	can I be exercising? can you be exercising? can he be exercising? can we be exercising? can you be exercising? can they be exercising?
Perfect	V-ing perfect
can I have exercised? can you have exercised? can he have exercised? can we have exercised? can you have exercised? can they have exercised?	can I have been exercising? can you have been exercising? can he have been exercising? can we have been exercising? can you have been exercising? can they have been exercising?

Interro-negative form

Simple form	V-ing form
can I not exercise? can you not exercise? can he not exercise? can we not exercise? can you not exercise? can they not exercise?	can I not be exercising? can you not be exercising? can he not be exercising? can we not be exercising? can you not be exercising? can they not be exercising?
Perfect	V-ing perfect
can I not have exercised? can you not have exercised? can he not have exercised? can we not have exercised? can you not have exercised? can they not have exercised?	can I not have been exercising? can you not have been exercising? can he not have been exercising? can we not have been exercising? can you not have been exercising? can they not have been exercising?