Conjugación del verbo inglés
MUST TIGHTEN

Verbo regular: tighten - tightened - tightened

Afirmación

Forma simple	Forma con V-ing
I must tighten you must tighten she must tighten we must tighten you must tighten they must tighten	I must be tightening you must be tightening she must be tightening we must be tightening you must be tightening they must be tightening
Perfecto	Perfecto con V-ing
I must have tightened you must have tightened she must have tightened we must have tightened you must have tightened they must have tightened	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

Negación

Forma simple	Forma con V-ing
I mustn't tighten you mustn't tighten she mustn't tighten we mustn't tighten you mustn't tighten they mustn't tighten	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
Perfecto	Perfecto con V-ing
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	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	Forma con V-ing
must I tighten? must you tighten? must she tighten? must we tighten? must you tighten? must they tighten?	must I be tightening? must you be tightening? must she be tightening? must we be tightening? must you be tightening? must they be tightening?
Perfecto	Perfecto con V-ing
must I have tightened? must you have tightened? must she have tightened? must we have tightened? must you have tightened? must they have tightened?	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-negativa

Forma simple	Forma con V-ing
mustn't I tighten? mustn't you tighten? mustn't she tighten? mustn't we tighten? mustn't you tighten? mustn't they tighten?	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?
Perfecto	Perfecto con V-ing
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?	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?