I must labialise you must labialise she must labialise we must labialise you must labialise they must labialise
V-ing form
I must be labialising you must be labialising she must be labialising we must be labialising you must be labialising they must be labialising
Perfect
I must have labialised you must have labialised she must have labialised we must have labialised you must have labialised they must have labialised
V-ing perfect
I must have been labialising you must have been labialising she must have been labialising we must have been labialising you must have been labialising they must have been labialising
Negation
Simple form
I must not labialise you must not labialise she must not labialise we must not labialise you must not labialise they must not labialise
V-ing form
I must not be labialising you must not be labialising she must not be labialising we must not be labialising you must not be labialising they must not be labialising
Perfect
I must not have labialised you must not have labialised she must not have labialised we must not have labialised you must not have labialised they must not have labialised
V-ing perfect
I must not have been labialising you must not have been labialising she must not have been labialising we must not have been labialising you must not have been labialising they must not have been labialising
Interrogative form
Simple form
must I labialise? must you labialise? must she labialise? must we labialise? must you labialise? must they labialise?
V-ing form
must I be labialising? must you be labialising? must she be labialising? must we be labialising? must you be labialising? must they be labialising?
Perfect
must I have labialised? must you have labialised? must she have labialised? must we have labialised? must you have labialised? must they have labialised?
V-ing perfect
must I have been labialising? must you have been labialising? must she have been labialising? must we have been labialising? must you have been labialising? must they have been labialising?
Interro-negative form
Simple form
must I not labialise? must you not labialise? must she not labialise? must we not labialise? must you not labialise? must they not labialise?
V-ing form
must I not be labialising? must you not be labialising? must she not be labialising? must we not be labialising? must you not be labialising? must they not be labialising?
Perfect
must I not have labialised? must you not have labialised? must she not have labialised? must we not have labialised? must you not have labialised? must they not have labialised?
V-ing perfect
must I not have been labialising? must you not have been labialising? must she not have been labialising? must we not have been labialising? must you not have been labialising? must they not have been labialising?