must labour
Verbo regolare: labour - laboured- laboured

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must labour
you must labour
she must labour
we must labour
you must labour
they must labour 	I must be labouring
you must be labouring
she must be labouring
we must be labouring
you must be labouring
they must be labouring	I must have laboured
you must have laboured
she must have laboured
we must have laboured
you must have laboured
they must have laboured	I must have been labouring
you must have been labouring
she must have been labouring
we must have been labouring
you must have been labouring
they must have been labouring	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must not labour
you must not labour
she must not labour
we must not labour
you must not labour
they must not labour 	I must not be labouring
you must not be labouring
she must not be labouring
we must not be labouring
you must not be labouring
they must not be labouring	I must not have laboured
you must not have laboured
she must not have laboured
we must not have laboured
you must not have laboured
they must not have laboured	I must not have been labouring
you must not have been labouring
she must not have been labouring
we must not have been labouring
you must not have been labouring
they must not have been labouring	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I labour?
must you labour?
must she labour?
must we labour?
must you labour?
must they labour? 	must I be labouring?
must you be labouring?
must she be labouring?
must we be labouring?
must you be labouring?
must they be labouring? 	must I have laboured?
must you have laboured?
must she have laboured?
must we have laboured?
must you have laboured?
must they have laboured? 	must I have been labouring?
must you have been labouring?
must she have been labouring?
must we have been labouring?
must you have been labouring?
must they have been labouring? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I not labour?
must you not labour?
must she not labour?
must we not labour?
must you not labour?
must they not labour? 	must I not be labouring?
must you not be labouring?
must she not be labouring?
must we not be labouring?
must you not be labouring?
must they not be labouring? 	must I not have laboured?
must you not have laboured?
must she not have laboured?
must we not have laboured?
must you not have laboured?
must they not have laboured? 	must I not have been labouring?
must you not have been labouring?
must she not have been labouring?
must we not have been labouring?
must you not have been labouring?
must they not have been labouring?