English verb conjugation
MUST QUICKEN

Regular verb: quicken - quickened - quickened

Affirmation

Simple form	V-ing form
I must quicken you must quicken she must quicken we must quicken you must quicken they must quicken	I must be quickening you must be quickening she must be quickening we must be quickening you must be quickening they must be quickening
Perfect	V-ing perfect
I must have quickened you must have quickened she must have quickened we must have quickened you must have quickened they must have quickened	I must have been quickening you must have been quickening she must have been quickening we must have been quickening you must have been quickening they must have been quickening

Negation

Simple form	V-ing form
I mustn't quicken you mustn't quicken she mustn't quicken we mustn't quicken you mustn't quicken they mustn't quicken	I mustn't be quickening you mustn't be quickening she mustn't be quickening we mustn't be quickening you mustn't be quickening they mustn't be quickening
Perfect	V-ing perfect
I mustn't have quickened you mustn't have quickened she mustn't have quickened we mustn't have quickened you mustn't have quickened they mustn't have quickened	I mustn't have been quickening you mustn't have been quickening she mustn't have been quickening we mustn't have been quickening you mustn't have been quickening they mustn't have been quickening

Interrogative form

Simple form	V-ing form
must I quicken? must you quicken? must she quicken? must we quicken? must you quicken? must they quicken?	must I be quickening? must you be quickening? must she be quickening? must we be quickening? must you be quickening? must they be quickening?
Perfect	V-ing perfect
must I have quickened? must you have quickened? must she have quickened? must we have quickened? must you have quickened? must they have quickened?	must I have been quickening? must you have been quickening? must she have been quickening? must we have been quickening? must you have been quickening? must they have been quickening?

Interro-negative form

Simple form	V-ing form
mustn't I quicken? mustn't you quicken? mustn't she quicken? mustn't we quicken? mustn't you quicken? mustn't they quicken?	mustn't I be quickening? mustn't you be quickening? mustn't she be quickening? mustn't we be quickening? mustn't you be quickening? mustn't they be quickening?
Perfect	V-ing perfect
mustn't I have quickened? mustn't you have quickened? mustn't she have quickened? mustn't we have quickened? mustn't you have quickened? mustn't they have quickened?	mustn't I have been quickening? mustn't you have been quickening? mustn't she have been quickening? mustn't we have been quickening? mustn't you have been quickening? mustn't they have been quickening?