English verb conjugation
MUST QUICKEN

Regular verb: quicken - quickened - quickened

Affirmation

Simple form	V-ing form
I must quicken you must quicken he must quicken we must quicken you must quicken they must quicken	I must be quickening you must be quickening he 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 he 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 he 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 he 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 he 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 he 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 he 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 he quicken? must we quicken? must you quicken? must they quicken?	must I be quickening? must you be quickening? must he 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 he 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 he 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 he 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 he 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 he 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 he have been quickening? mustn't we have been quickening? mustn't you have been quickening? mustn't they have been quickening?