English verb conjugation
MUST WINDOW-SHOP

Regular verb: window-shop - window-shoped - window-shoped

Affirmation

Simple form	V-ing form
I must window-shop you must window-shop she must window-shop we must window-shop you must window-shop they must window-shop	I must be window-shoping you must be window-shoping she must be window-shoping we must be window-shoping you must be window-shoping they must be window-shoping
Perfect	V-ing perfect
I must have window-shoped you must have window-shoped she must have window-shoped we must have window-shoped you must have window-shoped they must have window-shoped	I must have been window-shoping you must have been window-shoping she must have been window-shoping we must have been window-shoping you must have been window-shoping they must have been window-shoping

Negation

Simple form	V-ing form
I mustn't window-shop you mustn't window-shop she mustn't window-shop we mustn't window-shop you mustn't window-shop they mustn't window-shop	I mustn't be window-shoping you mustn't be window-shoping she mustn't be window-shoping we mustn't be window-shoping you mustn't be window-shoping they mustn't be window-shoping
Perfect	V-ing perfect
I mustn't have window-shoped you mustn't have window-shoped she mustn't have window-shoped we mustn't have window-shoped you mustn't have window-shoped they mustn't have window-shoped	I mustn't have been window-shoping you mustn't have been window-shoping she mustn't have been window-shoping we mustn't have been window-shoping you mustn't have been window-shoping they mustn't have been window-shoping

Interrogative form

Simple form	V-ing form
must I window-shop? must you window-shop? must she window-shop? must we window-shop? must you window-shop? must they window-shop?	must I be window-shoping? must you be window-shoping? must she be window-shoping? must we be window-shoping? must you be window-shoping? must they be window-shoping?
Perfect	V-ing perfect
must I have window-shoped? must you have window-shoped? must she have window-shoped? must we have window-shoped? must you have window-shoped? must they have window-shoped?	must I have been window-shoping? must you have been window-shoping? must she have been window-shoping? must we have been window-shoping? must you have been window-shoping? must they have been window-shoping?

Interro-negative form

Simple form	V-ing form
mustn't I window-shop? mustn't you window-shop? mustn't she window-shop? mustn't we window-shop? mustn't you window-shop? mustn't they window-shop?	mustn't I be window-shoping? mustn't you be window-shoping? mustn't she be window-shoping? mustn't we be window-shoping? mustn't you be window-shoping? mustn't they be window-shoping?
Perfect	V-ing perfect
mustn't I have window-shoped? mustn't you have window-shoped? mustn't she have window-shoped? mustn't we have window-shoped? mustn't you have window-shoped? mustn't they have window-shoped?	mustn't I have been window-shoping? mustn't you have been window-shoping? mustn't she have been window-shoping? mustn't we have been window-shoping? mustn't you have been window-shoping? mustn't they have been window-shoping?