English verb conjugation
MUST GROPE

Regular verb: grope - groped - groped

Affirmation

Simple form	V-ing form
I must grope you must grope she must grope we must grope you must grope they must grope	I must be groping you must be groping she must be groping we must be groping you must be groping they must be groping
Perfect	V-ing perfect
I must have groped you must have groped she must have groped we must have groped you must have groped they must have groped	I must have been groping you must have been groping she must have been groping we must have been groping you must have been groping they must have been groping

Negation

Simple form	V-ing form
I mustn't grope you mustn't grope she mustn't grope we mustn't grope you mustn't grope they mustn't grope	I mustn't be groping you mustn't be groping she mustn't be groping we mustn't be groping you mustn't be groping they mustn't be groping
Perfect	V-ing perfect
I mustn't have groped you mustn't have groped she mustn't have groped we mustn't have groped you mustn't have groped they mustn't have groped	I mustn't have been groping you mustn't have been groping she mustn't have been groping we mustn't have been groping you mustn't have been groping they mustn't have been groping

Interrogative form

Simple form	V-ing form
must I grope? must you grope? must she grope? must we grope? must you grope? must they grope?	must I be groping? must you be groping? must she be groping? must we be groping? must you be groping? must they be groping?
Perfect	V-ing perfect
must I have groped? must you have groped? must she have groped? must we have groped? must you have groped? must they have groped?	must I have been groping? must you have been groping? must she have been groping? must we have been groping? must you have been groping? must they have been groping?

Interro-negative form

Simple form	V-ing form
mustn't I grope? mustn't you grope? mustn't she grope? mustn't we grope? mustn't you grope? mustn't they grope?	mustn't I be groping? mustn't you be groping? mustn't she be groping? mustn't we be groping? mustn't you be groping? mustn't they be groping?
Perfect	V-ing perfect
mustn't I have groped? mustn't you have groped? mustn't she have groped? mustn't we have groped? mustn't you have groped? mustn't they have groped?	mustn't I have been groping? mustn't you have been groping? mustn't she have been groping? mustn't we have been groping? mustn't you have been groping? mustn't they have been groping?