I must cohabit you must cohabit she must cohabit we must cohabit you must cohabit they must cohabit
V-ing form
I must be cohabiting you must be cohabiting she must be cohabiting we must be cohabiting you must be cohabiting they must be cohabiting
Perfect
I must have cohabited you must have cohabited she must have cohabited we must have cohabited you must have cohabited they must have cohabited
V-ing perfect
I must have been cohabiting you must have been cohabiting she must have been cohabiting we must have been cohabiting you must have been cohabiting they must have been cohabiting
Negation
Simple form
I mustn't cohabit you mustn't cohabit she mustn't cohabit we mustn't cohabit you mustn't cohabit they mustn't cohabit
V-ing form
I mustn't be cohabiting you mustn't be cohabiting she mustn't be cohabiting we mustn't be cohabiting you mustn't be cohabiting they mustn't be cohabiting
Perfect
I mustn't have cohabited you mustn't have cohabited she mustn't have cohabited we mustn't have cohabited you mustn't have cohabited they mustn't have cohabited
V-ing perfect
I mustn't have been cohabiting you mustn't have been cohabiting she mustn't have been cohabiting we mustn't have been cohabiting you mustn't have been cohabiting they mustn't have been cohabiting
Interrogative form
Simple form
must I cohabit? must you cohabit? must she cohabit? must we cohabit? must you cohabit? must they cohabit?
V-ing form
must I be cohabiting? must you be cohabiting? must she be cohabiting? must we be cohabiting? must you be cohabiting? must they be cohabiting?
Perfect
must I have cohabited? must you have cohabited? must she have cohabited? must we have cohabited? must you have cohabited? must they have cohabited?
V-ing perfect
must I have been cohabiting? must you have been cohabiting? must she have been cohabiting? must we have been cohabiting? must you have been cohabiting? must they have been cohabiting?
Interro-negative form
Simple form
mustn't I cohabit? mustn't you cohabit? mustn't she cohabit? mustn't we cohabit? mustn't you cohabit? mustn't they cohabit?
V-ing form
mustn't I be cohabiting? mustn't you be cohabiting? mustn't she be cohabiting? mustn't we be cohabiting? mustn't you be cohabiting? mustn't they be cohabiting?
Perfect
mustn't I have cohabited? mustn't you have cohabited? mustn't she have cohabited? mustn't we have cohabited? mustn't you have cohabited? mustn't they have cohabited?
V-ing perfect
mustn't I have been cohabiting? mustn't you have been cohabiting? mustn't she have been cohabiting? mustn't we have been cohabiting? mustn't you have been cohabiting? mustn't they have been cohabiting?