English verb conjugation
MUST OUTSING

Irregular verb: outsing - outsang - outsung

Affirmation

Simple form	V-ing form
I must outsing you must outsing he must outsing we must outsing you must outsing they must outsing	I must be outsinging you must be outsinging he must be outsinging we must be outsinging you must be outsinging they must be outsinging
Perfect	V-ing perfect
I must have outsung you must have outsung he must have outsung we must have outsung you must have outsung they must have outsung	I must have been outsinging you must have been outsinging he must have been outsinging we must have been outsinging you must have been outsinging they must have been outsinging

Negation

Simple form	V-ing form
I mustn't outsing you mustn't outsing he mustn't outsing we mustn't outsing you mustn't outsing they mustn't outsing	I mustn't be outsinging you mustn't be outsinging he mustn't be outsinging we mustn't be outsinging you mustn't be outsinging they mustn't be outsinging
Perfect	V-ing perfect
I mustn't have outsung you mustn't have outsung he mustn't have outsung we mustn't have outsung you mustn't have outsung they mustn't have outsung	I mustn't have been outsinging you mustn't have been outsinging he mustn't have been outsinging we mustn't have been outsinging you mustn't have been outsinging they mustn't have been outsinging

Interrogative form

Simple form	V-ing form
must I outsing? must you outsing? must he outsing? must we outsing? must you outsing? must they outsing?	must I be outsinging? must you be outsinging? must he be outsinging? must we be outsinging? must you be outsinging? must they be outsinging?
Perfect	V-ing perfect
must I have outsung? must you have outsung? must he have outsung? must we have outsung? must you have outsung? must they have outsung?	must I have been outsinging? must you have been outsinging? must he have been outsinging? must we have been outsinging? must you have been outsinging? must they have been outsinging?

Interro-negative form

Simple form	V-ing form
mustn't I outsing? mustn't you outsing? mustn't he outsing? mustn't we outsing? mustn't you outsing? mustn't they outsing?	mustn't I be outsinging? mustn't you be outsinging? mustn't he be outsinging? mustn't we be outsinging? mustn't you be outsinging? mustn't they be outsinging?
Perfect	V-ing perfect
mustn't I have outsung? mustn't you have outsung? mustn't he have outsung? mustn't we have outsung? mustn't you have outsung? mustn't they have outsung?	mustn't I have been outsinging? mustn't you have been outsinging? mustn't he have been outsinging? mustn't we have been outsinging? mustn't you have been outsinging? mustn't they have been outsinging?