I must tighten you must tighten she must tighten we must tighten you must tighten they must tighten
Forma com V-ing
I must be tightening you must be tightening she must be tightening we must be tightening you must be tightening they must be tightening
Perfeito
I must have tightened you must have tightened she must have tightened we must have tightened you must have tightened they must have tightened
Perfeito com V-ing
I must have been tightening you must have been tightening she must have been tightening we must have been tightening you must have been tightening they must have been tightening
Negação
Forma simple
I mustn't tighten you mustn't tighten she mustn't tighten we mustn't tighten you mustn't tighten they mustn't tighten
Forma com V-ing
I mustn't be tightening you mustn't be tightening she mustn't be tightening we mustn't be tightening you mustn't be tightening they mustn't be tightening
Perfeito
I mustn't have tightened you mustn't have tightened she mustn't have tightened we mustn't have tightened you mustn't have tightened they mustn't have tightened
Perfeito com V-ing
I mustn't have been tightening you mustn't have been tightening she mustn't have been tightening we mustn't have been tightening you mustn't have been tightening they mustn't have been tightening
Forma interrogativa
Forma simple
must I tighten? must you tighten? must she tighten? must we tighten? must you tighten? must they tighten?
Forma com V-ing
must I be tightening? must you be tightening? must she be tightening? must we be tightening? must you be tightening? must they be tightening?
Perfeito
must I have tightened? must you have tightened? must she have tightened? must we have tightened? must you have tightened? must they have tightened?
Perfeito com V-ing
must I have been tightening? must you have been tightening? must she have been tightening? must we have been tightening? must you have been tightening? must they have been tightening?
Forma interro-Negação
Forma simple
mustn't I tighten? mustn't you tighten? mustn't she tighten? mustn't we tighten? mustn't you tighten? mustn't they tighten?
Forma com V-ing
mustn't I be tightening? mustn't you be tightening? mustn't she be tightening? mustn't we be tightening? mustn't you be tightening? mustn't they be tightening?
Perfeito
mustn't I have tightened? mustn't you have tightened? mustn't she have tightened? mustn't we have tightened? mustn't you have tightened? mustn't they have tightened?
Perfeito com V-ing
mustn't I have been tightening? mustn't you have been tightening? mustn't she have been tightening? mustn't we have been tightening? mustn't you have been tightening? mustn't they have been tightening?