must flake
Regular verb: flake - flaked- flaked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must flake
you must flake
he must flake
we must flake
you must flake
they must flake 	I must be flaking
you must be flaking
he must be flaking
we must be flaking
you must be flaking
they must be flaking	I must have flaked
you must have flaked
he must have flaked
we must have flaked
you must have flaked
they must have flaked	I must have been flaking
you must have been flaking
he must have been flaking
we must have been flaking
you must have been flaking
they must have been flaking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not flake
you must not flake
he must not flake
we must not flake
you must not flake
they must not flake 	I must not be flaking
you must not be flaking
he must not be flaking
we must not be flaking
you must not be flaking
they must not be flaking	I must not have flaked
you must not have flaked
he must not have flaked
we must not have flaked
you must not have flaked
they must not have flaked	I must not have been flaking
you must not have been flaking
he must not have been flaking
we must not have been flaking
you must not have been flaking
they must not have been flaking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I flake?
must you flake?
must he flake?
must we flake?
must you flake?
must they flake? 	must I be flaking?
must you be flaking?
must he be flaking?
must we be flaking?
must you be flaking?
must they be flaking? 	must I have flaked?
must you have flaked?
must he have flaked?
must we have flaked?
must you have flaked?
must they have flaked? 	must I have been flaking?
must you have been flaking?
must he have been flaking?
must we have been flaking?
must you have been flaking?
must they have been flaking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not flake?
must you not flake?
must he not flake?
must we not flake?
must you not flake?
must they not flake? 	must I not be flaking?
must you not be flaking?
must he not be flaking?
must we not be flaking?
must you not be flaking?
must they not be flaking? 	must I not have flaked?
must you not have flaked?
must he not have flaked?
must we not have flaked?
must you not have flaked?
must they not have flaked? 	must I not have been flaking?
must you not have been flaking?
must he not have been flaking?
must we not have been flaking?
must you not have been flaking?
must they not have been flaking?