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