I must shamble you must shamble he must shamble we must shamble you must shamble they must shamble
V-ing form
I must be shambling you must be shambling he must be shambling we must be shambling you must be shambling they must be shambling
Perfect
I must have shambled you must have shambled he must have shambled we must have shambled you must have shambled they must have shambled
V-ing perfect
I must have been shambling you must have been shambling he must have been shambling we must have been shambling you must have been shambling they must have been shambling
Negation
Simple form
I must not shamble you must not shamble he must not shamble we must not shamble you must not shamble they must not shamble
V-ing form
I must not be shambling you must not be shambling he must not be shambling we must not be shambling you must not be shambling they must not be shambling
Perfect
I must not have shambled you must not have shambled he must not have shambled we must not have shambled you must not have shambled they must not have shambled
V-ing perfect
I must not have been shambling you must not have been shambling he must not have been shambling we must not have been shambling you must not have been shambling they must not have been shambling
Interrogative form
Simple form
must I shamble? must you shamble? must he shamble? must we shamble? must you shamble? must they shamble?
V-ing form
must I be shambling? must you be shambling? must he be shambling? must we be shambling? must you be shambling? must they be shambling?
Perfect
must I have shambled? must you have shambled? must he have shambled? must we have shambled? must you have shambled? must they have shambled?
V-ing perfect
must I have been shambling? must you have been shambling? must he have been shambling? must we have been shambling? must you have been shambling? must they have been shambling?
Interro-negative form
Simple form
must I not shamble? must you not shamble? must he not shamble? must we not shamble? must you not shamble? must they not shamble?
V-ing form
must I not be shambling? must you not be shambling? must he not be shambling? must we not be shambling? must you not be shambling? must they not be shambling?
Perfect
must I not have shambled? must you not have shambled? must he not have shambled? must we not have shambled? must you not have shambled? must they not have shambled?
V-ing perfect
must I not have been shambling? must you not have been shambling? must he not have been shambling? must we not have been shambling? must you not have been shambling? must they not have been shambling?