English verb conjugation
COULD WINDOW-SHOP

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

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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