English verb conjugation
COULD ENVELOP

Regular verb: envelop - enveloped - enveloped

Affirmation

Simple form	V-ing form
I could envelop you could envelop he could envelop we could envelop you could envelop they could envelop	I could be enveloping you could be enveloping he could be enveloping we could be enveloping you could be enveloping they could be enveloping
Perfect	V-ing perfect
I could have enveloped you could have enveloped he could have enveloped we could have enveloped you could have enveloped they could have enveloped	I could have been enveloping you could have been enveloping he could have been enveloping we could have been enveloping you could have been enveloping they could have been enveloping

Negation

Simple form	V-ing form
I couldn't envelop you couldn't envelop he couldn't envelop we couldn't envelop you couldn't envelop they couldn't envelop	I couldn't be enveloping you couldn't be enveloping he couldn't be enveloping we couldn't be enveloping you couldn't be enveloping they couldn't be enveloping
Perfect	V-ing perfect
I couldn't have enveloped you couldn't have enveloped he couldn't have enveloped we couldn't have enveloped you couldn't have enveloped they couldn't have enveloped	I couldn't have been enveloping you couldn't have been enveloping he couldn't have been enveloping we couldn't have been enveloping you couldn't have been enveloping they couldn't have been enveloping

Interrogative form

Simple form	V-ing form
could I envelop? could you envelop? could he envelop? could we envelop? could you envelop? could they envelop?	could I be enveloping? could you be enveloping? could he be enveloping? could we be enveloping? could you be enveloping? could they be enveloping?
Perfect	V-ing perfect
could I have enveloped? could you have enveloped? could he have enveloped? could we have enveloped? could you have enveloped? could they have enveloped?	could I have been enveloping? could you have been enveloping? could he have been enveloping? could we have been enveloping? could you have been enveloping? could they have been enveloping?

Interro-negative form

Simple form	V-ing form
couldn't I envelop? couldn't you envelop? couldn't he envelop? couldn't we envelop? couldn't you envelop? couldn't they envelop?	couldn't I be enveloping? couldn't you be enveloping? couldn't he be enveloping? couldn't we be enveloping? couldn't you be enveloping? couldn't they be enveloping?
Perfect	V-ing perfect
couldn't I have enveloped? couldn't you have enveloped? couldn't he have enveloped? couldn't we have enveloped? couldn't you have enveloped? couldn't they have enveloped?	couldn't I have been enveloping? couldn't you have been enveloping? couldn't he have been enveloping? couldn't we have been enveloping? couldn't you have been enveloping? couldn't they have been enveloping?