must lash
Regular verb: lash - lashed- lashed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must lash
you must lash
she must lash
we must lash
you must lash
they must lash 	I must be lashing
you must be lashing
she must be lashing
we must be lashing
you must be lashing
they must be lashing	I must have lashed
you must have lashed
she must have lashed
we must have lashed
you must have lashed
they must have lashed	I must have been lashing
you must have been lashing
she must have been lashing
we must have been lashing
you must have been lashing
they must have been lashing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't lash
you mustn't lash
she mustn't lash
we mustn't lash
you mustn't lash
they mustn't lash 	I mustn't be lashing
you mustn't be lashing
she mustn't be lashing
we mustn't be lashing
you mustn't be lashing
they mustn't be lashing	I mustn't have lashed
you mustn't have lashed
she mustn't have lashed
we mustn't have lashed
you mustn't have lashed
they mustn't have lashed	I mustn't have been lashing
you mustn't have been lashing
she mustn't have been lashing
we mustn't have been lashing
you mustn't have been lashing
they mustn't have been lashing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I lash?
must you lash?
must she lash?
must we lash?
must you lash?
must they lash? 	must I be lashing?
must you be lashing?
must she be lashing?
must we be lashing?
must you be lashing?
must they be lashing? 	must I have lashed?
must you have lashed?
must she have lashed?
must we have lashed?
must you have lashed?
must they have lashed? 	must I have been lashing?
must you have been lashing?
must she have been lashing?
must we have been lashing?
must you have been lashing?
must they have been lashing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I lash?
mustn't you lash?
mustn't she lash?
mustn't we lash?
mustn't you lash?
mustn't they lash? 	mustn't I be lashing?
mustn't you be lashing?
mustn't she be lashing?
mustn't we be lashing?
mustn't you be lashing?
mustn't they be lashing? 	mustn't I have lashed?
mustn't you have lashed?
mustn't she have lashed?
mustn't we have lashed?
mustn't you have lashed?
mustn't they have lashed? 	mustn't I have been lashing?
mustn't you have been lashing?
mustn't she have been lashing?
mustn't we have been lashing?
mustn't you have been lashing?
mustn't they have been lashing?