must lean
Regular verb: lean - leaned- leaned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must lean
you must lean
she must lean
we must lean
you must lean
they must lean 	I must be leaning
you must be leaning
she must be leaning
we must be leaning
you must be leaning
they must be leaning	I must have leaned
you must have leaned
she must have leaned
we must have leaned
you must have leaned
they must have leaned	I must have been leaning
you must have been leaning
she must have been leaning
we must have been leaning
you must have been leaning
they must have been leaning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't lean
you mustn't lean
she mustn't lean
we mustn't lean
you mustn't lean
they mustn't lean 	I mustn't be leaning
you mustn't be leaning
she mustn't be leaning
we mustn't be leaning
you mustn't be leaning
they mustn't be leaning	I mustn't have leaned
you mustn't have leaned
she mustn't have leaned
we mustn't have leaned
you mustn't have leaned
they mustn't have leaned	I mustn't have been leaning
you mustn't have been leaning
she mustn't have been leaning
we mustn't have been leaning
you mustn't have been leaning
they mustn't have been leaning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I lean?
must you lean?
must she lean?
must we lean?
must you lean?
must they lean? 	must I be leaning?
must you be leaning?
must she be leaning?
must we be leaning?
must you be leaning?
must they be leaning? 	must I have leaned?
must you have leaned?
must she have leaned?
must we have leaned?
must you have leaned?
must they have leaned? 	must I have been leaning?
must you have been leaning?
must she have been leaning?
must we have been leaning?
must you have been leaning?
must they have been leaning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I lean?
mustn't you lean?
mustn't she lean?
mustn't we lean?
mustn't you lean?
mustn't they lean? 	mustn't I be leaning?
mustn't you be leaning?
mustn't she be leaning?
mustn't we be leaning?
mustn't you be leaning?
mustn't they be leaning? 	mustn't I have leaned?
mustn't you have leaned?
mustn't she have leaned?
mustn't we have leaned?
mustn't you have leaned?
mustn't they have leaned? 	mustn't I have been leaning?
mustn't you have been leaning?
mustn't she have been leaning?
mustn't we have been leaning?
mustn't you have been leaning?
mustn't they have been leaning?