Conjugaison du verbe anglais
MUST STIFF

Verbe régulier : stiff - stiffed - stiffed

Affirmation

Forme simple	Forme en V-ing
I must stiff you must stiff she must stiff we must stiff you must stiff they must stiff	I must be stiffing you must be stiffing she must be stiffing we must be stiffing you must be stiffing they must be stiffing
Perfect	Perfect en V-ing
I must have stiffed you must have stiffed she must have stiffed we must have stiffed you must have stiffed they must have stiffed	I must have been stiffing you must have been stiffing she must have been stiffing we must have been stiffing you must have been stiffing they must have been stiffing

Négation

Forme simple	Forme en V-ing
I must not stiff you must not stiff she must not stiff we must not stiff you must not stiff they must not stiff	I must not be stiffing you must not be stiffing she must not be stiffing we must not be stiffing you must not be stiffing they must not be stiffing
Perfect	Perfect en V-ing
I must not have stiffed you must not have stiffed she must not have stiffed we must not have stiffed you must not have stiffed they must not have stiffed	I must not have been stiffing you must not have been stiffing she must not have been stiffing we must not have been stiffing you must not have been stiffing they must not have been stiffing

Forme interrogative

Forme simple	Forme en V-ing
must I stiff? must you stiff? must she stiff? must we stiff? must you stiff? must they stiff?	must I be stiffing? must you be stiffing? must she be stiffing? must we be stiffing? must you be stiffing? must they be stiffing?
Perfect	Perfect en V-ing
must I have stiffed? must you have stiffed? must she have stiffed? must we have stiffed? must you have stiffed? must they have stiffed?	must I have been stiffing? must you have been stiffing? must she have been stiffing? must we have been stiffing? must you have been stiffing? must they have been stiffing?

Forme interro-négative

Forme simple	Forme en V-ing
must I not stiff? must you not stiff? must she not stiff? must we not stiff? must you not stiff? must they not stiff?	must I not be stiffing? must you not be stiffing? must she not be stiffing? must we not be stiffing? must you not be stiffing? must they not be stiffing?
Perfect	Perfect en V-ing
must I not have stiffed? must you not have stiffed? must she not have stiffed? must we not have stiffed? must you not have stiffed? must they not have stiffed?	must I not have been stiffing? must you not have been stiffing? must she not have been stiffing? must we not have been stiffing? must you not have been stiffing? must they not have been stiffing?