must clinch
Regular verb: clinch - clinched- clinched

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must clinch
you must clinch
she must clinch
we must clinch
you must clinch
they must clinch 	I must be clinching
you must be clinching
she must be clinching
we must be clinching
you must be clinching
they must be clinching	I must have clinched
you must have clinched
she must have clinched
we must have clinched
you must have clinched
they must have clinched	I must have been clinching
you must have been clinching
she must have been clinching
we must have been clinching
you must have been clinching
they must have been clinching	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't clinch
you mustn't clinch
she mustn't clinch
we mustn't clinch
you mustn't clinch
they mustn't clinch 	I mustn't be clinching
you mustn't be clinching
she mustn't be clinching
we mustn't be clinching
you mustn't be clinching
they mustn't be clinching	I mustn't have clinched
you mustn't have clinched
she mustn't have clinched
we mustn't have clinched
you mustn't have clinched
they mustn't have clinched	I mustn't have been clinching
you mustn't have been clinching
she mustn't have been clinching
we mustn't have been clinching
you mustn't have been clinching
they mustn't have been clinching	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I clinch?
must you clinch?
must she clinch?
must we clinch?
must you clinch?
must they clinch? 	must I be clinching?
must you be clinching?
must she be clinching?
must we be clinching?
must you be clinching?
must they be clinching? 	must I have clinched?
must you have clinched?
must she have clinched?
must we have clinched?
must you have clinched?
must they have clinched? 	must I have been clinching?
must you have been clinching?
must she have been clinching?
must we have been clinching?
must you have been clinching?
must they have been clinching? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I clinch?
mustn't you clinch?
mustn't she clinch?
mustn't we clinch?
mustn't you clinch?
mustn't they clinch? 	mustn't I be clinching?
mustn't you be clinching?
mustn't she be clinching?
mustn't we be clinching?
mustn't you be clinching?
mustn't they be clinching? 	mustn't I have clinched?
mustn't you have clinched?
mustn't she have clinched?
mustn't we have clinched?
mustn't you have clinched?
mustn't they have clinched? 	mustn't I have been clinching?
mustn't you have been clinching?
mustn't she have been clinching?
mustn't we have been clinching?
mustn't you have been clinching?
mustn't they have been clinching?