I must harmonise you must harmonise she must harmonise we must harmonise you must harmonise they must harmonise
V-ing form
I must be harmonising you must be harmonising she must be harmonising we must be harmonising you must be harmonising they must be harmonising
Perfect
I must have harmonised you must have harmonised she 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 she 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 she 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 she 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 she 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 she 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 she harmonise? must we harmonise? must you harmonise? must they harmonise?
V-ing form
must I be harmonising? must you be harmonising? must she be harmonising? must we be harmonising? must you be harmonising? must they be harmonising?
Perfect
must I have harmonised? must you have harmonised? must she 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 she 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 she 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 she 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 she 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 she have been harmonising? mustn't we have been harmonising? mustn't you have been harmonising? mustn't they have been harmonising?