must gutter
Regular verb: gutter - guttered- guttered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must gutter
you must gutter
she must gutter
we must gutter
you must gutter
they must gutter 	I must be guttering
you must be guttering
she must be guttering
we must be guttering
you must be guttering
they must be guttering	I must have guttered
you must have guttered
she must have guttered
we must have guttered
you must have guttered
they must have guttered	I must have been guttering
you must have been guttering
she must have been guttering
we must have been guttering
you must have been guttering
they must have been guttering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't gutter
you mustn't gutter
she mustn't gutter
we mustn't gutter
you mustn't gutter
they mustn't gutter 	I mustn't be guttering
you mustn't be guttering
she mustn't be guttering
we mustn't be guttering
you mustn't be guttering
they mustn't be guttering	I mustn't have guttered
you mustn't have guttered
she mustn't have guttered
we mustn't have guttered
you mustn't have guttered
they mustn't have guttered	I mustn't have been guttering
you mustn't have been guttering
she mustn't have been guttering
we mustn't have been guttering
you mustn't have been guttering
they mustn't have been guttering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I gutter?
must you gutter?
must she gutter?
must we gutter?
must you gutter?
must they gutter? 	must I be guttering?
must you be guttering?
must she be guttering?
must we be guttering?
must you be guttering?
must they be guttering? 	must I have guttered?
must you have guttered?
must she have guttered?
must we have guttered?
must you have guttered?
must they have guttered? 	must I have been guttering?
must you have been guttering?
must she have been guttering?
must we have been guttering?
must you have been guttering?
must they have been guttering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I gutter?
mustn't you gutter?
mustn't she gutter?
mustn't we gutter?
mustn't you gutter?
mustn't they gutter? 	mustn't I be guttering?
mustn't you be guttering?
mustn't she be guttering?
mustn't we be guttering?
mustn't you be guttering?
mustn't they be guttering? 	mustn't I have guttered?
mustn't you have guttered?
mustn't she have guttered?
mustn't we have guttered?
mustn't you have guttered?
mustn't they have guttered? 	mustn't I have been guttering?
mustn't you have been guttering?
mustn't she have been guttering?
mustn't we have been guttering?
mustn't you have been guttering?
mustn't they have been guttering?