English verb conjugation
MUST COUNT

Regular verb: count - counted - counted

Affirmation

Simple form	V-ing form
I must count you must count he must count we must count you must count they must count	I must be counting you must be counting he must be counting we must be counting you must be counting they must be counting
Perfect	V-ing perfect
I must have counted you must have counted he must have counted we must have counted you must have counted they must have counted	I must have been counting you must have been counting he must have been counting we must have been counting you must have been counting they must have been counting

Negation

Simple form	V-ing form
I mustn't count you mustn't count he mustn't count we mustn't count you mustn't count they mustn't count	I mustn't be counting you mustn't be counting he mustn't be counting we mustn't be counting you mustn't be counting they mustn't be counting
Perfect	V-ing perfect
I mustn't have counted you mustn't have counted he mustn't have counted we mustn't have counted you mustn't have counted they mustn't have counted	I mustn't have been counting you mustn't have been counting he mustn't have been counting we mustn't have been counting you mustn't have been counting they mustn't have been counting

Interrogative form

Simple form	V-ing form
must I count? must you count? must he count? must we count? must you count? must they count?	must I be counting? must you be counting? must he be counting? must we be counting? must you be counting? must they be counting?
Perfect	V-ing perfect
must I have counted? must you have counted? must he have counted? must we have counted? must you have counted? must they have counted?	must I have been counting? must you have been counting? must he have been counting? must we have been counting? must you have been counting? must they have been counting?

Interro-negative form

Simple form	V-ing form
mustn't I count? mustn't you count? mustn't he count? mustn't we count? mustn't you count? mustn't they count?	mustn't I be counting? mustn't you be counting? mustn't he be counting? mustn't we be counting? mustn't you be counting? mustn't they be counting?
Perfect	V-ing perfect
mustn't I have counted? mustn't you have counted? mustn't he have counted? mustn't we have counted? mustn't you have counted? mustn't they have counted?	mustn't I have been counting? mustn't you have been counting? mustn't he have been counting? mustn't we have been counting? mustn't you have been counting? mustn't they have been counting?