I must settle you must settle he must settle we must settle you must settle they must settle
V-ing form
I must be settling you must be settling he must be settling we must be settling you must be settling they must be settling
Perfect
I must have settled you must have settled he must have settled we must have settled you must have settled they must have settled
V-ing perfect
I must have been settling you must have been settling he must have been settling we must have been settling you must have been settling they must have been settling
Negation
Simple form
I mustn't settle you mustn't settle he mustn't settle we mustn't settle you mustn't settle they mustn't settle
V-ing form
I mustn't be settling you mustn't be settling he mustn't be settling we mustn't be settling you mustn't be settling they mustn't be settling
Perfect
I mustn't have settled you mustn't have settled he mustn't have settled we mustn't have settled you mustn't have settled they mustn't have settled
V-ing perfect
I mustn't have been settling you mustn't have been settling he mustn't have been settling we mustn't have been settling you mustn't have been settling they mustn't have been settling
Interrogative form
Simple form
must I settle? must you settle? must he settle? must we settle? must you settle? must they settle?
V-ing form
must I be settling? must you be settling? must he be settling? must we be settling? must you be settling? must they be settling?
Perfect
must I have settled? must you have settled? must he have settled? must we have settled? must you have settled? must they have settled?
V-ing perfect
must I have been settling? must you have been settling? must he have been settling? must we have been settling? must you have been settling? must they have been settling?
Interro-negative form
Simple form
mustn't I settle? mustn't you settle? mustn't he settle? mustn't we settle? mustn't you settle? mustn't they settle?
V-ing form
mustn't I be settling? mustn't you be settling? mustn't he be settling? mustn't we be settling? mustn't you be settling? mustn't they be settling?
Perfect
mustn't I have settled? mustn't you have settled? mustn't he have settled? mustn't we have settled? mustn't you have settled? mustn't they have settled?
V-ing perfect
mustn't I have been settling? mustn't you have been settling? mustn't he have been settling? mustn't we have been settling? mustn't you have been settling? mustn't they have been settling?