English verb conjugation
MUST INFEST

Regular verb: infest - infested - infested

Affirmation

Simple form	V-ing form
I must infest you must infest she must infest we must infest you must infest they must infest	I must be infesting you must be infesting she must be infesting we must be infesting you must be infesting they must be infesting
Perfect	V-ing perfect
I must have infested you must have infested she must have infested we must have infested you must have infested they must have infested	I must have been infesting you must have been infesting she must have been infesting we must have been infesting you must have been infesting they must have been infesting

Negation

Simple form	V-ing form
I mustn't infest you mustn't infest she mustn't infest we mustn't infest you mustn't infest they mustn't infest	I mustn't be infesting you mustn't be infesting she mustn't be infesting we mustn't be infesting you mustn't be infesting they mustn't be infesting
Perfect	V-ing perfect
I mustn't have infested you mustn't have infested she mustn't have infested we mustn't have infested you mustn't have infested they mustn't have infested	I mustn't have been infesting you mustn't have been infesting she mustn't have been infesting we mustn't have been infesting you mustn't have been infesting they mustn't have been infesting

Interrogative form

Simple form	V-ing form
must I infest? must you infest? must she infest? must we infest? must you infest? must they infest?	must I be infesting? must you be infesting? must she be infesting? must we be infesting? must you be infesting? must they be infesting?
Perfect	V-ing perfect
must I have infested? must you have infested? must she have infested? must we have infested? must you have infested? must they have infested?	must I have been infesting? must you have been infesting? must she have been infesting? must we have been infesting? must you have been infesting? must they have been infesting?

Interro-negative form

Simple form	V-ing form
mustn't I infest? mustn't you infest? mustn't she infest? mustn't we infest? mustn't you infest? mustn't they infest?	mustn't I be infesting? mustn't you be infesting? mustn't she be infesting? mustn't we be infesting? mustn't you be infesting? mustn't they be infesting?
Perfect	V-ing perfect
mustn't I have infested? mustn't you have infested? mustn't she have infested? mustn't we have infested? mustn't you have infested? mustn't they have infested?	mustn't I have been infesting? mustn't you have been infesting? mustn't she have been infesting? mustn't we have been infesting? mustn't you have been infesting? mustn't they have been infesting?