Conjugación del verbo inglés
MUST TIFF

Verbo regular: tiff - tiffed - tiffed

Afirmación

Forma simple	Forma con V-ing
I must tiff you must tiff she must tiff we must tiff you must tiff they must tiff	I must be tiffing you must be tiffing she must be tiffing we must be tiffing you must be tiffing they must be tiffing
Perfecto	Perfecto con V-ing
I must have tiffed you must have tiffed she must have tiffed we must have tiffed you must have tiffed they must have tiffed	I must have been tiffing you must have been tiffing she must have been tiffing we must have been tiffing you must have been tiffing they must have been tiffing

Negación

Forma simple	Forma con V-ing
I mustn't tiff you mustn't tiff she mustn't tiff we mustn't tiff you mustn't tiff they mustn't tiff	I mustn't be tiffing you mustn't be tiffing she mustn't be tiffing we mustn't be tiffing you mustn't be tiffing they mustn't be tiffing
Perfecto	Perfecto con V-ing
I mustn't have tiffed you mustn't have tiffed she mustn't have tiffed we mustn't have tiffed you mustn't have tiffed they mustn't have tiffed	I mustn't have been tiffing you mustn't have been tiffing she mustn't have been tiffing we mustn't have been tiffing you mustn't have been tiffing they mustn't have been tiffing

Forma interrogativa

Forma simple	Forma con V-ing
must I tiff? must you tiff? must she tiff? must we tiff? must you tiff? must they tiff?	must I be tiffing? must you be tiffing? must she be tiffing? must we be tiffing? must you be tiffing? must they be tiffing?
Perfecto	Perfecto con V-ing
must I have tiffed? must you have tiffed? must she have tiffed? must we have tiffed? must you have tiffed? must they have tiffed?	must I have been tiffing? must you have been tiffing? must she have been tiffing? must we have been tiffing? must you have been tiffing? must they have been tiffing?

Forma interro-negativa

Forma simple	Forma con V-ing
mustn't I tiff? mustn't you tiff? mustn't she tiff? mustn't we tiff? mustn't you tiff? mustn't they tiff?	mustn't I be tiffing? mustn't you be tiffing? mustn't she be tiffing? mustn't we be tiffing? mustn't you be tiffing? mustn't they be tiffing?
Perfecto	Perfecto con V-ing
mustn't I have tiffed? mustn't you have tiffed? mustn't she have tiffed? mustn't we have tiffed? mustn't you have tiffed? mustn't they have tiffed?	mustn't I have been tiffing? mustn't you have been tiffing? mustn't she have been tiffing? mustn't we have been tiffing? mustn't you have been tiffing? mustn't they have been tiffing?