must knot
Regular verb: knot - knotted- knotted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must knot
you must knot
she must knot
we must knot
you must knot
they must knot 	I must be knotting
you must be knotting
she must be knotting
we must be knotting
you must be knotting
they must be knotting	I must have knotted
you must have knotted
she must have knotted
we must have knotted
you must have knotted
they must have knotted	I must have been knotting
you must have been knotting
she must have been knotting
we must have been knotting
you must have been knotting
they must have been knotting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't knot
you mustn't knot
she mustn't knot
we mustn't knot
you mustn't knot
they mustn't knot 	I mustn't be knotting
you mustn't be knotting
she mustn't be knotting
we mustn't be knotting
you mustn't be knotting
they mustn't be knotting	I mustn't have knotted
you mustn't have knotted
she mustn't have knotted
we mustn't have knotted
you mustn't have knotted
they mustn't have knotted	I mustn't have been knotting
you mustn't have been knotting
she mustn't have been knotting
we mustn't have been knotting
you mustn't have been knotting
they mustn't have been knotting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I knot?
must you knot?
must she knot?
must we knot?
must you knot?
must they knot? 	must I be knotting?
must you be knotting?
must she be knotting?
must we be knotting?
must you be knotting?
must they be knotting? 	must I have knotted?
must you have knotted?
must she have knotted?
must we have knotted?
must you have knotted?
must they have knotted? 	must I have been knotting?
must you have been knotting?
must she have been knotting?
must we have been knotting?
must you have been knotting?
must they have been knotting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I knot?
mustn't you knot?
mustn't she knot?
mustn't we knot?
mustn't you knot?
mustn't they knot? 	mustn't I be knotting?
mustn't you be knotting?
mustn't she be knotting?
mustn't we be knotting?
mustn't you be knotting?
mustn't they be knotting? 	mustn't I have knotted?
mustn't you have knotted?
mustn't she have knotted?
mustn't we have knotted?
mustn't you have knotted?
mustn't they have knotted? 	mustn't I have been knotting?
mustn't you have been knotting?
mustn't she have been knotting?
mustn't we have been knotting?
mustn't you have been knotting?
mustn't they have been knotting?