fold back
To bend or crease something back. A noun or pronoun can be used between "fold" and "back." She folded back the paper again, producing an origami crane.
fold something back
to bend a sheet or flap of something back. She very carefully folded the page back to mark her place in the book. She folded back the page to mark her place in the book. The surgeon folded the flap of skin back, revealing the torn ligament.
fold back
[for a sheet of something] to bend back. The cloth folded back, revealing the faded upholstery below. The top page folded back, revealing a neatly typed manuscript.