must lease
Regular verb: lease - leased- leased

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must lease
you must lease
she must lease
we must lease
you must lease
they must lease 	I must be leasing
you must be leasing
she must be leasing
we must be leasing
you must be leasing
they must be leasing	I must have leased
you must have leased
she must have leased
we must have leased
you must have leased
they must have leased	I must have been leasing
you must have been leasing
she must have been leasing
we must have been leasing
you must have been leasing
they must have been leasing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't lease
you mustn't lease
she mustn't lease
we mustn't lease
you mustn't lease
they mustn't lease 	I mustn't be leasing
you mustn't be leasing
she mustn't be leasing
we mustn't be leasing
you mustn't be leasing
they mustn't be leasing	I mustn't have leased
you mustn't have leased
she mustn't have leased
we mustn't have leased
you mustn't have leased
they mustn't have leased	I mustn't have been leasing
you mustn't have been leasing
she mustn't have been leasing
we mustn't have been leasing
you mustn't have been leasing
they mustn't have been leasing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I lease?
must you lease?
must she lease?
must we lease?
must you lease?
must they lease? 	must I be leasing?
must you be leasing?
must she be leasing?
must we be leasing?
must you be leasing?
must they be leasing? 	must I have leased?
must you have leased?
must she have leased?
must we have leased?
must you have leased?
must they have leased? 	must I have been leasing?
must you have been leasing?
must she have been leasing?
must we have been leasing?
must you have been leasing?
must they have been leasing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I lease?
mustn't you lease?
mustn't she lease?
mustn't we lease?
mustn't you lease?
mustn't they lease? 	mustn't I be leasing?
mustn't you be leasing?
mustn't she be leasing?
mustn't we be leasing?
mustn't you be leasing?
mustn't they be leasing? 	mustn't I have leased?
mustn't you have leased?
mustn't she have leased?
mustn't we have leased?
mustn't you have leased?
mustn't they have leased? 	mustn't I have been leasing?
mustn't you have been leasing?
mustn't she have been leasing?
mustn't we have been leasing?
mustn't you have been leasing?
mustn't they have been leasing?