I should lesson you should lesson she should lesson we should lesson you should lesson they should lesson
V-ing form
I should be lessoning you should be lessoning she should be lessoning we should be lessoning you should be lessoning they should be lessoning
Perfect
I should have lessoned you should have lessoned she should have lessoned we should have lessoned you should have lessoned they should have lessoned
V-ing perfect
I should have been lessoning you should have been lessoning she should have been lessoning we should have been lessoning you should have been lessoning they should have been lessoning
Negation
Simple form
I should not lesson you should not lesson she should not lesson we should not lesson you should not lesson they should not lesson
V-ing form
I should not be lessoning you should not be lessoning she should not be lessoning we should not be lessoning you should not be lessoning they should not be lessoning
Perfect
I should not have lessoned you should not have lessoned she should not have lessoned we should not have lessoned you should not have lessoned they should not have lessoned
V-ing perfect
I should not have been lessoning you should not have been lessoning she should not have been lessoning we should not have been lessoning you should not have been lessoning they should not have been lessoning
Interrogative form
Simple form
should I lesson? should you lesson? should she lesson? should we lesson? should you lesson? should they lesson?
V-ing form
should I be lessoning? should you be lessoning? should she be lessoning? should we be lessoning? should you be lessoning? should they be lessoning?
Perfect
should I have lessoned? should you have lessoned? should she have lessoned? should we have lessoned? should you have lessoned? should they have lessoned?
V-ing perfect
should I have been lessoning? should you have been lessoning? should she have been lessoning? should we have been lessoning? should you have been lessoning? should they have been lessoning?
Interro-negative form
Simple form
should I not lesson? should you not lesson? should she not lesson? should we not lesson? should you not lesson? should they not lesson?
V-ing form
should I not be lessoning? should you not be lessoning? should she not be lessoning? should we not be lessoning? should you not be lessoning? should they not be lessoning?
Perfect
should I not have lessoned? should you not have lessoned? should she not have lessoned? should we not have lessoned? should you not have lessoned? should they not have lessoned?
V-ing perfect
should I not have been lessoning? should you not have been lessoning? should she not have been lessoning? should we not have been lessoning? should you not have been lessoning? should they not have been lessoning?