must clonk
Regular verb: clonk - clonked- clonked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must clonk
you must clonk
she must clonk
we must clonk
you must clonk
they must clonk 	I must be clonking
you must be clonking
she must be clonking
we must be clonking
you must be clonking
they must be clonking	I must have clonked
you must have clonked
she must have clonked
we must have clonked
you must have clonked
they must have clonked	I must have been clonking
you must have been clonking
she must have been clonking
we must have been clonking
you must have been clonking
they must have been clonking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't clonk
you mustn't clonk
she mustn't clonk
we mustn't clonk
you mustn't clonk
they mustn't clonk 	I mustn't be clonking
you mustn't be clonking
she mustn't be clonking
we mustn't be clonking
you mustn't be clonking
they mustn't be clonking	I mustn't have clonked
you mustn't have clonked
she mustn't have clonked
we mustn't have clonked
you mustn't have clonked
they mustn't have clonked	I mustn't have been clonking
you mustn't have been clonking
she mustn't have been clonking
we mustn't have been clonking
you mustn't have been clonking
they mustn't have been clonking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I clonk?
must you clonk?
must she clonk?
must we clonk?
must you clonk?
must they clonk? 	must I be clonking?
must you be clonking?
must she be clonking?
must we be clonking?
must you be clonking?
must they be clonking? 	must I have clonked?
must you have clonked?
must she have clonked?
must we have clonked?
must you have clonked?
must they have clonked? 	must I have been clonking?
must you have been clonking?
must she have been clonking?
must we have been clonking?
must you have been clonking?
must they have been clonking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I clonk?
mustn't you clonk?
mustn't she clonk?
mustn't we clonk?
mustn't you clonk?
mustn't they clonk? 	mustn't I be clonking?
mustn't you be clonking?
mustn't she be clonking?
mustn't we be clonking?
mustn't you be clonking?
mustn't they be clonking? 	mustn't I have clonked?
mustn't you have clonked?
mustn't she have clonked?
mustn't we have clonked?
mustn't you have clonked?
mustn't they have clonked? 	mustn't I have been clonking?
mustn't you have been clonking?
mustn't she have been clonking?
mustn't we have been clonking?
mustn't you have been clonking?
mustn't they have been clonking?