must pinnacle
Regular verb: pinnacle - pinnacled- pinnacled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must pinnacle
you must pinnacle
he must pinnacle
we must pinnacle
you must pinnacle
they must pinnacle 	I must be pinnacling
you must be pinnacling
he must be pinnacling
we must be pinnacling
you must be pinnacling
they must be pinnacling	I must have pinnacled
you must have pinnacled
he must have pinnacled
we must have pinnacled
you must have pinnacled
they must have pinnacled	I must have been pinnacling
you must have been pinnacling
he must have been pinnacling
we must have been pinnacling
you must have been pinnacling
they must have been pinnacling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't pinnacle
you mustn't pinnacle
he mustn't pinnacle
we mustn't pinnacle
you mustn't pinnacle
they mustn't pinnacle 	I mustn't be pinnacling
you mustn't be pinnacling
he mustn't be pinnacling
we mustn't be pinnacling
you mustn't be pinnacling
they mustn't be pinnacling	I mustn't have pinnacled
you mustn't have pinnacled
he mustn't have pinnacled
we mustn't have pinnacled
you mustn't have pinnacled
they mustn't have pinnacled	I mustn't have been pinnacling
you mustn't have been pinnacling
he mustn't have been pinnacling
we mustn't have been pinnacling
you mustn't have been pinnacling
they mustn't have been pinnacling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I pinnacle?
must you pinnacle?
must he pinnacle?
must we pinnacle?
must you pinnacle?
must they pinnacle? 	must I be pinnacling?
must you be pinnacling?
must he be pinnacling?
must we be pinnacling?
must you be pinnacling?
must they be pinnacling? 	must I have pinnacled?
must you have pinnacled?
must he have pinnacled?
must we have pinnacled?
must you have pinnacled?
must they have pinnacled? 	must I have been pinnacling?
must you have been pinnacling?
must he have been pinnacling?
must we have been pinnacling?
must you have been pinnacling?
must they have been pinnacling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I pinnacle?
mustn't you pinnacle?
mustn't he pinnacle?
mustn't we pinnacle?
mustn't you pinnacle?
mustn't they pinnacle? 	mustn't I be pinnacling?
mustn't you be pinnacling?
mustn't he be pinnacling?
mustn't we be pinnacling?
mustn't you be pinnacling?
mustn't they be pinnacling? 	mustn't I have pinnacled?
mustn't you have pinnacled?
mustn't he have pinnacled?
mustn't we have pinnacled?
mustn't you have pinnacled?
mustn't they have pinnacled? 	mustn't I have been pinnacling?
mustn't you have been pinnacling?
mustn't he have been pinnacling?
mustn't we have been pinnacling?
mustn't you have been pinnacling?
mustn't they have been pinnacling?