must irk
Regular verb: irk - irked- irked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must irk
you must irk
she must irk
we must irk
you must irk
they must irk 	I must be irking
you must be irking
she must be irking
we must be irking
you must be irking
they must be irking	I must have irked
you must have irked
she must have irked
we must have irked
you must have irked
they must have irked	I must have been irking
you must have been irking
she must have been irking
we must have been irking
you must have been irking
they must have been irking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't irk
you mustn't irk
she mustn't irk
we mustn't irk
you mustn't irk
they mustn't irk 	I mustn't be irking
you mustn't be irking
she mustn't be irking
we mustn't be irking
you mustn't be irking
they mustn't be irking	I mustn't have irked
you mustn't have irked
she mustn't have irked
we mustn't have irked
you mustn't have irked
they mustn't have irked	I mustn't have been irking
you mustn't have been irking
she mustn't have been irking
we mustn't have been irking
you mustn't have been irking
they mustn't have been irking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I irk?
must you irk?
must she irk?
must we irk?
must you irk?
must they irk? 	must I be irking?
must you be irking?
must she be irking?
must we be irking?
must you be irking?
must they be irking? 	must I have irked?
must you have irked?
must she have irked?
must we have irked?
must you have irked?
must they have irked? 	must I have been irking?
must you have been irking?
must she have been irking?
must we have been irking?
must you have been irking?
must they have been irking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I irk?
mustn't you irk?
mustn't she irk?
mustn't we irk?
mustn't you irk?
mustn't they irk? 	mustn't I be irking?
mustn't you be irking?
mustn't she be irking?
mustn't we be irking?
mustn't you be irking?
mustn't they be irking? 	mustn't I have irked?
mustn't you have irked?
mustn't she have irked?
mustn't we have irked?
mustn't you have irked?
mustn't they have irked? 	mustn't I have been irking?
mustn't you have been irking?
mustn't she have been irking?
mustn't we have been irking?
mustn't you have been irking?
mustn't they have been irking?