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