English verb conjugation
MUST LOO

Regular verb: loo - looed - looed

Affirmation

Simple form	V-ing form
I must loo you must loo he must loo we must loo you must loo they must loo	I must be looing you must be looing he must be looing we must be looing you must be looing they must be looing
Perfect	V-ing perfect
I must have looed you must have looed he must have looed we must have looed you must have looed they must have looed	I must have been looing you must have been looing he must have been looing we must have been looing you must have been looing they must have been looing

Negation

Simple form	V-ing form
I mustn't loo you mustn't loo he mustn't loo we mustn't loo you mustn't loo they mustn't loo	I mustn't be looing you mustn't be looing he mustn't be looing we mustn't be looing you mustn't be looing they mustn't be looing
Perfect	V-ing perfect
I mustn't have looed you mustn't have looed he mustn't have looed we mustn't have looed you mustn't have looed they mustn't have looed	I mustn't have been looing you mustn't have been looing he mustn't have been looing we mustn't have been looing you mustn't have been looing they mustn't have been looing

Interrogative form

Simple form	V-ing form
must I loo? must you loo? must he loo? must we loo? must you loo? must they loo?	must I be looing? must you be looing? must he be looing? must we be looing? must you be looing? must they be looing?
Perfect	V-ing perfect
must I have looed? must you have looed? must he have looed? must we have looed? must you have looed? must they have looed?	must I have been looing? must you have been looing? must he have been looing? must we have been looing? must you have been looing? must they have been looing?

Interro-negative form

Simple form	V-ing form
mustn't I loo? mustn't you loo? mustn't he loo? mustn't we loo? mustn't you loo? mustn't they loo?	mustn't I be looing? mustn't you be looing? mustn't he be looing? mustn't we be looing? mustn't you be looing? mustn't they be looing?
Perfect	V-ing perfect
mustn't I have looed? mustn't you have looed? mustn't he have looed? mustn't we have looed? mustn't you have looed? mustn't they have looed?	mustn't I have been looing? mustn't you have been looing? mustn't he have been looing? mustn't we have been looing? mustn't you have been looing? mustn't they have been looing?