English verb conjugation
MUST PROTECT

Regular verb: protect - protected - protected

Affirmation

Simple form	V-ing form
I must protect you must protect he must protect we must protect you must protect they must protect	I must be protecting you must be protecting he must be protecting we must be protecting you must be protecting they must be protecting
Perfect	V-ing perfect
I must have protected you must have protected he must have protected we must have protected you must have protected they must have protected	I must have been protecting you must have been protecting he must have been protecting we must have been protecting you must have been protecting they must have been protecting

Negation

Simple form	V-ing form
I mustn't protect you mustn't protect he mustn't protect we mustn't protect you mustn't protect they mustn't protect	I mustn't be protecting you mustn't be protecting he mustn't be protecting we mustn't be protecting you mustn't be protecting they mustn't be protecting
Perfect	V-ing perfect
I mustn't have protected you mustn't have protected he mustn't have protected we mustn't have protected you mustn't have protected they mustn't have protected	I mustn't have been protecting you mustn't have been protecting he mustn't have been protecting we mustn't have been protecting you mustn't have been protecting they mustn't have been protecting

Interrogative form

Simple form	V-ing form
must I protect? must you protect? must he protect? must we protect? must you protect? must they protect?	must I be protecting? must you be protecting? must he be protecting? must we be protecting? must you be protecting? must they be protecting?
Perfect	V-ing perfect
must I have protected? must you have protected? must he have protected? must we have protected? must you have protected? must they have protected?	must I have been protecting? must you have been protecting? must he have been protecting? must we have been protecting? must you have been protecting? must they have been protecting?

Interro-negative form

Simple form	V-ing form
mustn't I protect? mustn't you protect? mustn't he protect? mustn't we protect? mustn't you protect? mustn't they protect?	mustn't I be protecting? mustn't you be protecting? mustn't he be protecting? mustn't we be protecting? mustn't you be protecting? mustn't they be protecting?
Perfect	V-ing perfect
mustn't I have protected? mustn't you have protected? mustn't he have protected? mustn't we have protected? mustn't you have protected? mustn't they have protected?	mustn't I have been protecting? mustn't you have been protecting? mustn't he have been protecting? mustn't we have been protecting? mustn't you have been protecting? mustn't they have been protecting?