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 must not straiten you must not straiten she must not straiten we must not straiten you must not straiten they must not straiten	I must not be straitening you must not be straitening she must not be straitening we must not be straitening you must not be straitening they must not be straitening
Perfect	V-ing perfect
I must not have straitened you must not have straitened she must not have straitened we must not have straitened you must not have straitened they must not have straitened	I must not have been straitening you must not have been straitening she must not have been straitening we must not have been straitening you must not have been straitening they must not 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
must I not straiten? must you not straiten? must she not straiten? must we not straiten? must you not straiten? must they not straiten?	must I not be straitening? must you not be straitening? must she not be straitening? must we not be straitening? must you not be straitening? must they not be straitening?
Perfect	V-ing perfect
must I not have straitened? must you not have straitened? must she not have straitened? must we not have straitened? must you not have straitened? must they not have straitened?	must I not have been straitening? must you not have been straitening? must she not have been straitening? must we not have been straitening? must you not have been straitening? must they not have been straitening?