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