English verb conjugation
MUST SPEAR

Regular verb: spear - speared - speared

Affirmation

Simple form	V-ing form
I must spear you must spear he must spear we must spear you must spear they must spear	I must be spearing you must be spearing he must be spearing we must be spearing you must be spearing they must be spearing
Perfect	V-ing perfect
I must have speared you must have speared he must have speared we must have speared you must have speared they must have speared	I must have been spearing you must have been spearing he must have been spearing we must have been spearing you must have been spearing they must have been spearing

Negation

Simple form	V-ing form
I mustn't spear you mustn't spear he mustn't spear we mustn't spear you mustn't spear they mustn't spear	I mustn't be spearing you mustn't be spearing he mustn't be spearing we mustn't be spearing you mustn't be spearing they mustn't be spearing
Perfect	V-ing perfect
I mustn't have speared you mustn't have speared he mustn't have speared we mustn't have speared you mustn't have speared they mustn't have speared	I mustn't have been spearing you mustn't have been spearing he mustn't have been spearing we mustn't have been spearing you mustn't have been spearing they mustn't have been spearing

Interrogative form

Simple form	V-ing form
must I spear? must you spear? must he spear? must we spear? must you spear? must they spear?	must I be spearing? must you be spearing? must he be spearing? must we be spearing? must you be spearing? must they be spearing?
Perfect	V-ing perfect
must I have speared? must you have speared? must he have speared? must we have speared? must you have speared? must they have speared?	must I have been spearing? must you have been spearing? must he have been spearing? must we have been spearing? must you have been spearing? must they have been spearing?

Interro-negative form

Simple form	V-ing form
mustn't I spear? mustn't you spear? mustn't he spear? mustn't we spear? mustn't you spear? mustn't they spear?	mustn't I be spearing? mustn't you be spearing? mustn't he be spearing? mustn't we be spearing? mustn't you be spearing? mustn't they be spearing?
Perfect	V-ing perfect
mustn't I have speared? mustn't you have speared? mustn't he have speared? mustn't we have speared? mustn't you have speared? mustn't they have speared?	mustn't I have been spearing? mustn't you have been spearing? mustn't he have been spearing? mustn't we have been spearing? mustn't you have been spearing? mustn't they have been spearing?