English verb conjugation
MUST SUBTEND

Regular verb: subtend - subtended - subtended

Affirmation

Simple form	V-ing form
I must subtend you must subtend she must subtend we must subtend you must subtend they must subtend	I must be subtending you must be subtending she 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 she 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 she 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 she 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 she 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 she 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 she 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 she subtend? must we subtend? must you subtend? must they subtend?	must I be subtending? must you be subtending? must she 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 she 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 she 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 she 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 she 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 she 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 she have been subtending? mustn't we have been subtending? mustn't you have been subtending? mustn't they have been subtending?