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