English verb conjugation
MUST SUBTEND

Regular verb: subtend - subtended - subtended

Affirmation

Simple form	V-ing form
I must subtend you must subtend he must subtend we must subtend you must subtend they must subtend	I must be subtending you must be subtending he must be subtending we must be subtending you must be subtending they must be subtending
Perfect	V-ing perfect
I must have subtended you must have subtended he must have subtended we must have subtended you must have subtended they must have subtended	I must have been subtending you must have been subtending he must have been subtending we must have been subtending you must have been subtending they must have been subtending

Negation

Simple form	V-ing form
I mustn't subtend you mustn't subtend he mustn't subtend we mustn't subtend you mustn't subtend they mustn't subtend	I mustn't be subtending you mustn't be subtending he mustn't be subtending we mustn't be subtending you mustn't be subtending they mustn't be subtending
Perfect	V-ing perfect
I mustn't have subtended you mustn't have subtended he mustn't have subtended we mustn't have subtended you mustn't have subtended they mustn't have subtended	I mustn't have been subtending you mustn't have been subtending he mustn't have been subtending we mustn't have been subtending you mustn't have been subtending they mustn't have been subtending

Interrogative form

Simple form	V-ing form
must I subtend? must you subtend? must he subtend? must we subtend? must you subtend? must they subtend?	must I be subtending? must you be subtending? must he be subtending? must we be subtending? must you be subtending? must they be subtending?
Perfect	V-ing perfect
must I have subtended? must you have subtended? must he have subtended? must we have subtended? must you have subtended? must they have subtended?	must I have been subtending? must you have been subtending? must he have been subtending? must we have been subtending? must you have been subtending? must they have been subtending?

Interro-negative form

Simple form	V-ing form
mustn't I subtend? mustn't you subtend? mustn't he subtend? mustn't we subtend? mustn't you subtend? mustn't they subtend?	mustn't I be subtending? mustn't you be subtending? mustn't he be subtending? mustn't we be subtending? mustn't you be subtending? mustn't they be subtending?
Perfect	V-ing perfect
mustn't I have subtended? mustn't you have subtended? mustn't he have subtended? mustn't we have subtended? mustn't you have subtended? mustn't they have subtended?	mustn't I have been subtending? mustn't you have been subtending? mustn't he have been subtending? mustn't we have been subtending? mustn't you have been subtending? mustn't they have been subtending?