must birl
Verbe régulier : birl - birled- birled

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must birl
you must birl
she must birl
we must birl
you must birl
they must birl 	I must be birling
you must be birling
she must be birling
we must be birling
you must be birling
they must be birling	I must have birled
you must have birled
she must have birled
we must have birled
you must have birled
they must have birled	I must have been birling
you must have been birling
she must have been birling
we must have been birling
you must have been birling
they must have been birling	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not birl
you must not birl
she must not birl
we must not birl
you must not birl
they must not birl 	I must not be birling
you must not be birling
she must not be birling
we must not be birling
you must not be birling
they must not be birling	I must not have birled
you must not have birled
she must not have birled
we must not have birled
you must not have birled
they must not have birled	I must not have been birling
you must not have been birling
she must not have been birling
we must not have been birling
you must not have been birling
they must not have been birling	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I birl?
must you birl?
must she birl?
must we birl?
must you birl?
must they birl? 	must I be birling?
must you be birling?
must she be birling?
must we be birling?
must you be birling?
must they be birling? 	must I have birled?
must you have birled?
must she have birled?
must we have birled?
must you have birled?
must they have birled? 	must I have been birling?
must you have been birling?
must she have been birling?
must we have been birling?
must you have been birling?
must they have been birling? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not birl?
must you not birl?
must she not birl?
must we not birl?
must you not birl?
must they not birl? 	must I not be birling?
must you not be birling?
must she not be birling?
must we not be birling?
must you not be birling?
must they not be birling? 	must I not have birled?
must you not have birled?
must she not have birled?
must we not have birled?
must you not have birled?
must they not have birled? 	must I not have been birling?
must you not have been birling?
must she not have been birling?
must we not have been birling?
must you not have been birling?
must they not have been birling?