must sinew
Regular verb: sinew - sinewed- sinewed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must sinew
you must sinew
he must sinew
we must sinew
you must sinew
they must sinew 	I must be sinewing
you must be sinewing
he must be sinewing
we must be sinewing
you must be sinewing
they must be sinewing	I must have sinewed
you must have sinewed
he must have sinewed
we must have sinewed
you must have sinewed
they must have sinewed	I must have been sinewing
you must have been sinewing
he must have been sinewing
we must have been sinewing
you must have been sinewing
they must have been sinewing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't sinew
you mustn't sinew
he mustn't sinew
we mustn't sinew
you mustn't sinew
they mustn't sinew 	I mustn't be sinewing
you mustn't be sinewing
he mustn't be sinewing
we mustn't be sinewing
you mustn't be sinewing
they mustn't be sinewing	I mustn't have sinewed
you mustn't have sinewed
he mustn't have sinewed
we mustn't have sinewed
you mustn't have sinewed
they mustn't have sinewed	I mustn't have been sinewing
you mustn't have been sinewing
he mustn't have been sinewing
we mustn't have been sinewing
you mustn't have been sinewing
they mustn't have been sinewing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I sinew?
must you sinew?
must he sinew?
must we sinew?
must you sinew?
must they sinew? 	must I be sinewing?
must you be sinewing?
must he be sinewing?
must we be sinewing?
must you be sinewing?
must they be sinewing? 	must I have sinewed?
must you have sinewed?
must he have sinewed?
must we have sinewed?
must you have sinewed?
must they have sinewed? 	must I have been sinewing?
must you have been sinewing?
must he have been sinewing?
must we have been sinewing?
must you have been sinewing?
must they have been sinewing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I sinew?
mustn't you sinew?
mustn't he sinew?
mustn't we sinew?
mustn't you sinew?
mustn't they sinew? 	mustn't I be sinewing?
mustn't you be sinewing?
mustn't he be sinewing?
mustn't we be sinewing?
mustn't you be sinewing?
mustn't they be sinewing? 	mustn't I have sinewed?
mustn't you have sinewed?
mustn't he have sinewed?
mustn't we have sinewed?
mustn't you have sinewed?
mustn't they have sinewed? 	mustn't I have been sinewing?
mustn't you have been sinewing?
mustn't he have been sinewing?
mustn't we have been sinewing?
mustn't you have been sinewing?
mustn't they have been sinewing?