must buy
Verbo irregolare: buy - bought- bought

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must buy
you must buy
she must buy
we must buy
you must buy
they must buy 	I must be buying
you must be buying
she must be buying
we must be buying
you must be buying
they must be buying	I must have bought
you must have bought
she must have bought
we must have bought
you must have bought
they must have bought	I must have been buying
you must have been buying
she must have been buying
we must have been buying
you must have been buying
they must have been buying	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I mustn't buy
you mustn't buy
she mustn't buy
we mustn't buy
you mustn't buy
they mustn't buy 	I mustn't be buying
you mustn't be buying
she mustn't be buying
we mustn't be buying
you mustn't be buying
they mustn't be buying	I mustn't have bought
you mustn't have bought
she mustn't have bought
we mustn't have bought
you mustn't have bought
they mustn't have bought	I mustn't have been buying
you mustn't have been buying
she mustn't have been buying
we mustn't have been buying
you mustn't have been buying
they mustn't have been buying	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I buy?
must you buy?
must she buy?
must we buy?
must you buy?
must they buy? 	must I be buying?
must you be buying?
must she be buying?
must we be buying?
must you be buying?
must they be buying? 	must I have bought?
must you have bought?
must she have bought?
must we have bought?
must you have bought?
must they have bought? 	must I have been buying?
must you have been buying?
must she have been buying?
must we have been buying?
must you have been buying?
must they have been buying? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
mustn't I buy?
mustn't you buy?
mustn't she buy?
mustn't we buy?
mustn't you buy?
mustn't they buy? 	mustn't I be buying?
mustn't you be buying?
mustn't she be buying?
mustn't we be buying?
mustn't you be buying?
mustn't they be buying? 	mustn't I have bought?
mustn't you have bought?
mustn't she have bought?
mustn't we have bought?
mustn't you have bought?
mustn't they have bought? 	mustn't I have been buying?
mustn't you have been buying?
mustn't she have been buying?
mustn't we have been buying?
mustn't you have been buying?
mustn't they have been buying?