I could revitalize you could revitalize he could revitalize we could revitalize you could revitalize they could revitalize
V-ing form
I could be revitalizing you could be revitalizing he could be revitalizing we could be revitalizing you could be revitalizing they could be revitalizing
Perfect
I could have revitalized you could have revitalized he could have revitalized we could have revitalized you could have revitalized they could have revitalized
V-ing perfect
I could have been revitalizing you could have been revitalizing he could have been revitalizing we could have been revitalizing you could have been revitalizing they could have been revitalizing
Negation
Simple form
I couldn't revitalize you couldn't revitalize he couldn't revitalize we couldn't revitalize you couldn't revitalize they couldn't revitalize
V-ing form
I couldn't be revitalizing you couldn't be revitalizing he couldn't be revitalizing we couldn't be revitalizing you couldn't be revitalizing they couldn't be revitalizing
Perfect
I couldn't have revitalized you couldn't have revitalized he couldn't have revitalized we couldn't have revitalized you couldn't have revitalized they couldn't have revitalized
V-ing perfect
I couldn't have been revitalizing you couldn't have been revitalizing he couldn't have been revitalizing we couldn't have been revitalizing you couldn't have been revitalizing they couldn't have been revitalizing
Interrogative form
Simple form
could I revitalize? could you revitalize? could he revitalize? could we revitalize? could you revitalize? could they revitalize?
V-ing form
could I be revitalizing? could you be revitalizing? could he be revitalizing? could we be revitalizing? could you be revitalizing? could they be revitalizing?
Perfect
could I have revitalized? could you have revitalized? could he have revitalized? could we have revitalized? could you have revitalized? could they have revitalized?
V-ing perfect
could I have been revitalizing? could you have been revitalizing? could he have been revitalizing? could we have been revitalizing? could you have been revitalizing? could they have been revitalizing?
Interro-negative form
Simple form
couldn't I revitalize? couldn't you revitalize? couldn't he revitalize? couldn't we revitalize? couldn't you revitalize? couldn't they revitalize?
V-ing form
couldn't I be revitalizing? couldn't you be revitalizing? couldn't he be revitalizing? couldn't we be revitalizing? couldn't you be revitalizing? couldn't they be revitalizing?
Perfect
couldn't I have revitalized? couldn't you have revitalized? couldn't he have revitalized? couldn't we have revitalized? couldn't you have revitalized? couldn't they have revitalized?
V-ing perfect
couldn't I have been revitalizing? couldn't you have been revitalizing? couldn't he have been revitalizing? couldn't we have been revitalizing? couldn't you have been revitalizing? couldn't they have been revitalizing?