must fife
Verbe régulier : fife - fifed- fifed

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must fife
you must fife
she must fife
we must fife
you must fife
they must fife 	I must be fifing
you must be fifing
she must be fifing
we must be fifing
you must be fifing
they must be fifing	I must have fifed
you must have fifed
she must have fifed
we must have fifed
you must have fifed
they must have fifed	I must have been fifing
you must have been fifing
she must have been fifing
we must have been fifing
you must have been fifing
they must have been fifing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not fife
you must not fife
she must not fife
we must not fife
you must not fife
they must not fife 	I must not be fifing
you must not be fifing
she must not be fifing
we must not be fifing
you must not be fifing
they must not be fifing	I must not have fifed
you must not have fifed
she must not have fifed
we must not have fifed
you must not have fifed
they must not have fifed	I must not have been fifing
you must not have been fifing
she must not have been fifing
we must not have been fifing
you must not have been fifing
they must not have been fifing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I fife?
must you fife?
must she fife?
must we fife?
must you fife?
must they fife? 	must I be fifing?
must you be fifing?
must she be fifing?
must we be fifing?
must you be fifing?
must they be fifing? 	must I have fifed?
must you have fifed?
must she have fifed?
must we have fifed?
must you have fifed?
must they have fifed? 	must I have been fifing?
must you have been fifing?
must she have been fifing?
must we have been fifing?
must you have been fifing?
must they have been fifing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not fife?
must you not fife?
must she not fife?
must we not fife?
must you not fife?
must they not fife? 	must I not be fifing?
must you not be fifing?
must she not be fifing?
must we not be fifing?
must you not be fifing?
must they not be fifing? 	must I not have fifed?
must you not have fifed?
must she not have fifed?
must we not have fifed?
must you not have fifed?
must they not have fifed? 	must I not have been fifing?
must you not have been fifing?
must she not have been fifing?
must we not have been fifing?
must you not have been fifing?
must they not have been fifing?