English verb conjugation
CAN LESSON

Regular verb: lesson - lessoned - lessoned

Affirmation

Simple form	V-ing form
I can lesson you can lesson he can lesson we can lesson you can lesson they can lesson	I can be lessoning you can be lessoning he can be lessoning we can be lessoning you can be lessoning they can be lessoning
Perfect	V-ing perfect
I can have lessoned you can have lessoned he can have lessoned we can have lessoned you can have lessoned they can have lessoned	I can have been lessoning you can have been lessoning he can have been lessoning we can have been lessoning you can have been lessoning they can have been lessoning

Negation

Simple form	V-ing form
I cannot lesson you cannot lesson he cannot lesson we cannot lesson you cannot lesson they cannot lesson	I cannot be lessoning you cannot be lessoning he cannot be lessoning we cannot be lessoning you cannot be lessoning they cannot be lessoning
Perfect	V-ing perfect
I cannot have lessoned you cannot have lessoned he cannot have lessoned we cannot have lessoned you cannot have lessoned they cannot have lessoned	I cannot have been lessoning you cannot have been lessoning he cannot have been lessoning we cannot have been lessoning you cannot have been lessoning they cannot have been lessoning

Interrogative form

Simple form	V-ing form
can I lesson? can you lesson? can he lesson? can we lesson? can you lesson? can they lesson?	can I be lessoning? can you be lessoning? can he be lessoning? can we be lessoning? can you be lessoning? can they be lessoning?
Perfect	V-ing perfect
can I have lessoned? can you have lessoned? can he have lessoned? can we have lessoned? can you have lessoned? can they have lessoned?	can I have been lessoning? can you have been lessoning? can he have been lessoning? can we have been lessoning? can you have been lessoning? can they have been lessoning?

Interro-negative form

Simple form	V-ing form
can I not lesson? can you not lesson? can he not lesson? can we not lesson? can you not lesson? can they not lesson?	can I not be lessoning? can you not be lessoning? can he not be lessoning? can we not be lessoning? can you not be lessoning? can they not be lessoning?
Perfect	V-ing perfect
can I not have lessoned? can you not have lessoned? can he not have lessoned? can we not have lessoned? can you not have lessoned? can they not have lessoned?	can I not have been lessoning? can you not have been lessoning? can he not have been lessoning? can we not have been lessoning? can you not have been lessoning? can they not have been lessoning?