I must tread you must tread she must tread we must tread you must tread they must tread
Forma con V-ing
I must be treading you must be treading she must be treading we must be treading you must be treading they must be treading
Perfetto
I must have trod, trodden you must have trod, trodden she must have trod, trodden we must have trod, trodden you must have trod, trodden they must have trod, trodden
Perfetto con V-ing
I must have been treading you must have been treading she must have been treading we must have been treading you must have been treading they must have been treading
Negazione
Forma semplice
I mustn't tread you mustn't tread she mustn't tread we mustn't tread you mustn't tread they mustn't tread
Forma con V-ing
I mustn't be treading you mustn't be treading she mustn't be treading we mustn't be treading you mustn't be treading they mustn't be treading
Perfetto
I mustn't have trod, trodden you mustn't have trod, trodden she mustn't have trod, trodden we mustn't have trod, trodden you mustn't have trod, trodden they mustn't have trod, trodden
Perfetto con V-ing
I mustn't have been treading you mustn't have been treading she mustn't have been treading we mustn't have been treading you mustn't have been treading they mustn't have been treading
Forma interrogativa
Forma semplice
must I tread? must you tread? must she tread? must we tread? must you tread? must they tread?
Forma con V-ing
must I be treading? must you be treading? must she be treading? must we be treading? must you be treading? must they be treading?
Perfetto
must I have trod, trodden? must you have trod, trodden? must she have trod, trodden? must we have trod, trodden? must you have trod, trodden? must they have trod, trodden?
Perfetto con V-ing
must I have been treading? must you have been treading? must she have been treading? must we have been treading? must you have been treading? must they have been treading?
Forma interro-negativa
Forma semplice
mustn't I tread? mustn't you tread? mustn't she tread? mustn't we tread? mustn't you tread? mustn't they tread?
Forma con V-ing
mustn't I be treading? mustn't you be treading? mustn't she be treading? mustn't we be treading? mustn't you be treading? mustn't they be treading?
Perfetto
mustn't I have trod, trodden? mustn't you have trod, trodden? mustn't she have trod, trodden? mustn't we have trod, trodden? mustn't you have trod, trodden? mustn't they have trod, trodden?
Perfetto con V-ing
mustn't I have been treading? mustn't you have been treading? mustn't she have been treading? mustn't we have been treading? mustn't you have been treading? mustn't they have been treading?