Conjugación del verbo inglés
MUST TIGHTEN

Verbo regular: tighten - tightened - tightened

Afirmación

Forma simple	Forma con V-ing
I must tighten you must tighten he must tighten we must tighten you must tighten they must tighten	I must be tightening you must be tightening he 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 he 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 he 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 must not tighten you must not tighten he must not tighten we must not tighten you must not tighten they must not tighten	I must not be tightening you must not be tightening he must not be tightening we must not be tightening you must not be tightening they must not be tightening
Perfecto	Perfecto con V-ing
I must not have tightened you must not have tightened he must not have tightened we must not have tightened you must not have tightened they must not have tightened	I must not have been tightening you must not have been tightening he must not have been tightening we must not have been tightening you must not have been tightening they must not have been tightening

Forma interrogativa

Forma simple	Forma con V-ing
must I tighten? must you tighten? must he tighten? must we tighten? must you tighten? must they tighten?	must I be tightening? must you be tightening? must he 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 he 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 he 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
must I not tighten? must you not tighten? must he not tighten? must we not tighten? must you not tighten? must they not tighten?	must I not be tightening? must you not be tightening? must he not be tightening? must we not be tightening? must you not be tightening? must they not be tightening?
Perfecto	Perfecto con V-ing
must I not have tightened? must you not have tightened? must he not have tightened? must we not have tightened? must you not have tightened? must they not have tightened?	must I not have been tightening? must you not have been tightening? must he not have been tightening? must we not have been tightening? must you not have been tightening? must they not have been tightening?