must clank
Regular verb: clank - clanked- clanked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must clank
you must clank
she must clank
we must clank
you must clank
they must clank 	I must be clanking
you must be clanking
she must be clanking
we must be clanking
you must be clanking
they must be clanking	I must have clanked
you must have clanked
she must have clanked
we must have clanked
you must have clanked
they must have clanked	I must have been clanking
you must have been clanking
she must have been clanking
we must have been clanking
you must have been clanking
they must have been clanking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't clank
you mustn't clank
she mustn't clank
we mustn't clank
you mustn't clank
they mustn't clank 	I mustn't be clanking
you mustn't be clanking
she mustn't be clanking
we mustn't be clanking
you mustn't be clanking
they mustn't be clanking	I mustn't have clanked
you mustn't have clanked
she mustn't have clanked
we mustn't have clanked
you mustn't have clanked
they mustn't have clanked	I mustn't have been clanking
you mustn't have been clanking
she mustn't have been clanking
we mustn't have been clanking
you mustn't have been clanking
they mustn't have been clanking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I clank?
must you clank?
must she clank?
must we clank?
must you clank?
must they clank? 	must I be clanking?
must you be clanking?
must she be clanking?
must we be clanking?
must you be clanking?
must they be clanking? 	must I have clanked?
must you have clanked?
must she have clanked?
must we have clanked?
must you have clanked?
must they have clanked? 	must I have been clanking?
must you have been clanking?
must she have been clanking?
must we have been clanking?
must you have been clanking?
must they have been clanking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I clank?
mustn't you clank?
mustn't she clank?
mustn't we clank?
mustn't you clank?
mustn't they clank? 	mustn't I be clanking?
mustn't you be clanking?
mustn't she be clanking?
mustn't we be clanking?
mustn't you be clanking?
mustn't they be clanking? 	mustn't I have clanked?
mustn't you have clanked?
mustn't she have clanked?
mustn't we have clanked?
mustn't you have clanked?
mustn't they have clanked? 	mustn't I have been clanking?
mustn't you have been clanking?
mustn't she have been clanking?
mustn't we have been clanking?
mustn't you have been clanking?
mustn't they have been clanking?