English verb conjugation
MUST STRAITEN

Regular verb: straiten - straitened - straitened

Affirmation

Simple form	V-ing form
I must straiten you must straiten she must straiten we must straiten you must straiten they must straiten	I must be straitening you must be straitening she must be straitening we must be straitening you must be straitening they must be straitening
Perfect	V-ing perfect
I must have straitened you must have straitened she must have straitened we must have straitened you must have straitened they must have straitened	I must have been straitening you must have been straitening she must have been straitening we must have been straitening you must have been straitening they must have been straitening

Negation

Simple form	V-ing form
I mustn't straiten you mustn't straiten she mustn't straiten we mustn't straiten you mustn't straiten they mustn't straiten	I mustn't be straitening you mustn't be straitening she mustn't be straitening we mustn't be straitening you mustn't be straitening they mustn't be straitening
Perfect	V-ing perfect
I mustn't have straitened you mustn't have straitened she mustn't have straitened we mustn't have straitened you mustn't have straitened they mustn't have straitened	I mustn't have been straitening you mustn't have been straitening she mustn't have been straitening we mustn't have been straitening you mustn't have been straitening they mustn't have been straitening

Interrogative form

Simple form	V-ing form
must I straiten? must you straiten? must she straiten? must we straiten? must you straiten? must they straiten?	must I be straitening? must you be straitening? must she be straitening? must we be straitening? must you be straitening? must they be straitening?
Perfect	V-ing perfect
must I have straitened? must you have straitened? must she have straitened? must we have straitened? must you have straitened? must they have straitened?	must I have been straitening? must you have been straitening? must she have been straitening? must we have been straitening? must you have been straitening? must they have been straitening?

Interro-negative form

Simple form	V-ing form
mustn't I straiten? mustn't you straiten? mustn't she straiten? mustn't we straiten? mustn't you straiten? mustn't they straiten?	mustn't I be straitening? mustn't you be straitening? mustn't she be straitening? mustn't we be straitening? mustn't you be straitening? mustn't they be straitening?
Perfect	V-ing perfect
mustn't I have straitened? mustn't you have straitened? mustn't she have straitened? mustn't we have straitened? mustn't you have straitened? mustn't they have straitened?	mustn't I have been straitening? mustn't you have been straitening? mustn't she have been straitening? mustn't we have been straitening? mustn't you have been straitening? mustn't they have been straitening?