I could beautify you could beautify she could beautify we could beautify you could beautify they could beautify
V-ing form
I could be beautifying you could be beautifying she could be beautifying we could be beautifying you could be beautifying they could be beautifying
Perfect
I could have beautified you could have beautified she could have beautified we could have beautified you could have beautified they could have beautified
V-ing perfect
I could have been beautifying you could have been beautifying she could have been beautifying we could have been beautifying you could have been beautifying they could have been beautifying
Negation
Simple form
I could not beautify you could not beautify she could not beautify we could not beautify you could not beautify they could not beautify
V-ing form
I could not be beautifying you could not be beautifying she could not be beautifying we could not be beautifying you could not be beautifying they could not be beautifying
Perfect
I could not have beautified you could not have beautified she could not have beautified we could not have beautified you could not have beautified they could not have beautified
V-ing perfect
I could not have been beautifying you could not have been beautifying she could not have been beautifying we could not have been beautifying you could not have been beautifying they could not have been beautifying
Interrogative form
Simple form
could I beautify? could you beautify? could she beautify? could we beautify? could you beautify? could they beautify?
V-ing form
could I be beautifying? could you be beautifying? could she be beautifying? could we be beautifying? could you be beautifying? could they be beautifying?
Perfect
could I have beautified? could you have beautified? could she have beautified? could we have beautified? could you have beautified? could they have beautified?
V-ing perfect
could I have been beautifying? could you have been beautifying? could she have been beautifying? could we have been beautifying? could you have been beautifying? could they have been beautifying?
Interro-negative form
Simple form
could I not beautify? could you not beautify? could she not beautify? could we not beautify? could you not beautify? could they not beautify?
V-ing form
could I not be beautifying? could you not be beautifying? could she not be beautifying? could we not be beautifying? could you not be beautifying? could they not be beautifying?
Perfect
could I not have beautified? could you not have beautified? could she not have beautified? could we not have beautified? could you not have beautified? could they not have beautified?
V-ing perfect
could I not have been beautifying? could you not have been beautifying? could she not have been beautifying? could we not have been beautifying? could you not have been beautifying? could they not have been beautifying?