must embank
Regular verb: embank - embanked- embanked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must embank
you must embank
she must embank
we must embank
you must embank
they must embank 	I must be embanking
you must be embanking
she must be embanking
we must be embanking
you must be embanking
they must be embanking	I must have embanked
you must have embanked
she must have embanked
we must have embanked
you must have embanked
they must have embanked	I must have been embanking
you must have been embanking
she must have been embanking
we must have been embanking
you must have been embanking
they must have been embanking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't embank
you mustn't embank
she mustn't embank
we mustn't embank
you mustn't embank
they mustn't embank 	I mustn't be embanking
you mustn't be embanking
she mustn't be embanking
we mustn't be embanking
you mustn't be embanking
they mustn't be embanking	I mustn't have embanked
you mustn't have embanked
she mustn't have embanked
we mustn't have embanked
you mustn't have embanked
they mustn't have embanked	I mustn't have been embanking
you mustn't have been embanking
she mustn't have been embanking
we mustn't have been embanking
you mustn't have been embanking
they mustn't have been embanking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I embank?
must you embank?
must she embank?
must we embank?
must you embank?
must they embank? 	must I be embanking?
must you be embanking?
must she be embanking?
must we be embanking?
must you be embanking?
must they be embanking? 	must I have embanked?
must you have embanked?
must she have embanked?
must we have embanked?
must you have embanked?
must they have embanked? 	must I have been embanking?
must you have been embanking?
must she have been embanking?
must we have been embanking?
must you have been embanking?
must they have been embanking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I embank?
mustn't you embank?
mustn't she embank?
mustn't we embank?
mustn't you embank?
mustn't they embank? 	mustn't I be embanking?
mustn't you be embanking?
mustn't she be embanking?
mustn't we be embanking?
mustn't you be embanking?
mustn't they be embanking? 	mustn't I have embanked?
mustn't you have embanked?
mustn't she have embanked?
mustn't we have embanked?
mustn't you have embanked?
mustn't they have embanked? 	mustn't I have been embanking?
mustn't you have been embanking?
mustn't she have been embanking?
mustn't we have been embanking?
mustn't you have been embanking?
mustn't they have been embanking?