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