I must concretise you must concretise he must concretise we must concretise you must concretise they must concretise
V-ing form
I must be concretising you must be concretising he must be concretising we must be concretising you must be concretising they must be concretising
Perfect
I must have concretised you must have concretised he must have concretised we must have concretised you must have concretised they must have concretised
V-ing perfect
I must have been concretising you must have been concretising he must have been concretising we must have been concretising you must have been concretising they must have been concretising
Negation
Simple form
I must not concretise you must not concretise he must not concretise we must not concretise you must not concretise they must not concretise
V-ing form
I must not be concretising you must not be concretising he must not be concretising we must not be concretising you must not be concretising they must not be concretising
Perfect
I must not have concretised you must not have concretised he must not have concretised we must not have concretised you must not have concretised they must not have concretised
V-ing perfect
I must not have been concretising you must not have been concretising he must not have been concretising we must not have been concretising you must not have been concretising they must not have been concretising
Interrogative form
Simple form
must I concretise? must you concretise? must he concretise? must we concretise? must you concretise? must they concretise?
V-ing form
must I be concretising? must you be concretising? must he be concretising? must we be concretising? must you be concretising? must they be concretising?
Perfect
must I have concretised? must you have concretised? must he have concretised? must we have concretised? must you have concretised? must they have concretised?
V-ing perfect
must I have been concretising? must you have been concretising? must he have been concretising? must we have been concretising? must you have been concretising? must they have been concretising?
Interro-negative form
Simple form
must I not concretise? must you not concretise? must he not concretise? must we not concretise? must you not concretise? must they not concretise?
V-ing form
must I not be concretising? must you not be concretising? must he not be concretising? must we not be concretising? must you not be concretising? must they not be concretising?
Perfect
must I not have concretised? must you not have concretised? must he not have concretised? must we not have concretised? must you not have concretised? must they not have concretised?
V-ing perfect
must I not have been concretising? must you not have been concretising? must he not have been concretising? must we not have been concretising? must you not have been concretising? must they not have been concretising?