1. My dad has a tall figure. Here is a photo of him from behind.2. Here is a photo of my dad's back.3. I painted a view of my dad's back.4. My grandfather has passed away. I often leaf through photo after photo of him from behind, wearing a nondescript T-shirt and blending into various street scenes.
 a view of somebody's back a view of somebody from behind somebody from behind somebody's back「這是一張我父親的背影的照片」可說 Here is a photo of my father from behind. 或 Here is a photo of my dad's back.
It gives the illuson that you've computed the entire answer immediately.