Conjugaison du verbe anglais
MUST TIFF

Verbe régulier : tiff - tiffed - tiffed

Affirmation

Forme simple	Forme en 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
Perfect	Perfect en 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

Négation

Forme simple	Forme en V-ing
I must not tiff you must not tiff she must not tiff we must not tiff you must not tiff they must not tiff	I must not be tiffing you must not be tiffing she must not be tiffing we must not be tiffing you must not be tiffing they must not be tiffing
Perfect	Perfect en V-ing
I must not have tiffed you must not have tiffed she must not have tiffed we must not have tiffed you must not have tiffed they must not have tiffed	I must not have been tiffing you must not have been tiffing she must not have been tiffing we must not have been tiffing you must not have been tiffing they must not have been tiffing

Forme interrogative

Forme simple	Forme en 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?
Perfect	Perfect en 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?

Forme interro-négative

Forme simple	Forme en V-ing
must I not tiff? must you not tiff? must she not tiff? must we not tiff? must you not tiff? must they not tiff?	must I not be tiffing? must you not be tiffing? must she not be tiffing? must we not be tiffing? must you not be tiffing? must they not be tiffing?
Perfect	Perfect en V-ing
must I not have tiffed? must you not have tiffed? must she not have tiffed? must we not have tiffed? must you not have tiffed? must they not have tiffed?	must I not have been tiffing? must you not have been tiffing? must she not have been tiffing? must we not have been tiffing? must you not have been tiffing? must they not have been tiffing?