I could personalize you could personalize she could personalize we could personalize you could personalize they could personalize
V-ing form
I could be personalizing you could be personalizing she could be personalizing we could be personalizing you could be personalizing they could be personalizing
Perfect
I could have personalized you could have personalized she could have personalized we could have personalized you could have personalized they could have personalized
V-ing perfect
I could have been personalizing you could have been personalizing she could have been personalizing we could have been personalizing you could have been personalizing they could have been personalizing
Negation
Simple form
I couldn't personalize you couldn't personalize she couldn't personalize we couldn't personalize you couldn't personalize they couldn't personalize
V-ing form
I couldn't be personalizing you couldn't be personalizing she couldn't be personalizing we couldn't be personalizing you couldn't be personalizing they couldn't be personalizing
Perfect
I couldn't have personalized you couldn't have personalized she couldn't have personalized we couldn't have personalized you couldn't have personalized they couldn't have personalized
V-ing perfect
I couldn't have been personalizing you couldn't have been personalizing she couldn't have been personalizing we couldn't have been personalizing you couldn't have been personalizing they couldn't have been personalizing
Interrogative form
Simple form
could I personalize? could you personalize? could she personalize? could we personalize? could you personalize? could they personalize?
V-ing form
could I be personalizing? could you be personalizing? could she be personalizing? could we be personalizing? could you be personalizing? could they be personalizing?
Perfect
could I have personalized? could you have personalized? could she have personalized? could we have personalized? could you have personalized? could they have personalized?
V-ing perfect
could I have been personalizing? could you have been personalizing? could she have been personalizing? could we have been personalizing? could you have been personalizing? could they have been personalizing?
Interro-negative form
Simple form
couldn't I personalize? couldn't you personalize? couldn't she personalize? couldn't we personalize? couldn't you personalize? couldn't they personalize?
V-ing form
couldn't I be personalizing? couldn't you be personalizing? couldn't she be personalizing? couldn't we be personalizing? couldn't you be personalizing? couldn't they be personalizing?
Perfect
couldn't I have personalized? couldn't you have personalized? couldn't she have personalized? couldn't we have personalized? couldn't you have personalized? couldn't they have personalized?
V-ing perfect
couldn't I have been personalizing? couldn't you have been personalizing? couldn't she have been personalizing? couldn't we have been personalizing? couldn't you have been personalizing? couldn't they have been personalizing?