must lichen
Verbe régulier : lichen - lichened- lichened

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must lichen
you must lichen
she must lichen
we must lichen
you must lichen
they must lichen 	I must be lichening
you must be lichening
she must be lichening
we must be lichening
you must be lichening
they must be lichening	I must have lichened
you must have lichened
she must have lichened
we must have lichened
you must have lichened
they must have lichened	I must have been lichening
you must have been lichening
she must have been lichening
we must have been lichening
you must have been lichening
they must have been lichening	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not lichen
you must not lichen
she must not lichen
we must not lichen
you must not lichen
they must not lichen 	I must not be lichening
you must not be lichening
she must not be lichening
we must not be lichening
you must not be lichening
they must not be lichening	I must not have lichened
you must not have lichened
she must not have lichened
we must not have lichened
you must not have lichened
they must not have lichened	I must not have been lichening
you must not have been lichening
she must not have been lichening
we must not have been lichening
you must not have been lichening
they must not have been lichening	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I lichen?
must you lichen?
must she lichen?
must we lichen?
must you lichen?
must they lichen? 	must I be lichening?
must you be lichening?
must she be lichening?
must we be lichening?
must you be lichening?
must they be lichening? 	must I have lichened?
must you have lichened?
must she have lichened?
must we have lichened?
must you have lichened?
must they have lichened? 	must I have been lichening?
must you have been lichening?
must she have been lichening?
must we have been lichening?
must you have been lichening?
must they have been lichening? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not lichen?
must you not lichen?
must she not lichen?
must we not lichen?
must you not lichen?
must they not lichen? 	must I not be lichening?
must you not be lichening?
must she not be lichening?
must we not be lichening?
must you not be lichening?
must they not be lichening? 	must I not have lichened?
must you not have lichened?
must she not have lichened?
must we not have lichened?
must you not have lichened?
must they not have lichened? 	must I not have been lichening?
must you not have been lichening?
must she not have been lichening?
must we not have been lichening?
must you not have been lichening?
must they not have been lichening?