Answer:
Here’s an example,
She lay on the floor helplessly. Her heart felt as if it were glass and somebody had dropped it. Her face crumbled, “Life was meaningless!” She thought while curling up into a ball.
As you can see, while writing that, I had used a Simile. ‘Her heart felt as if it were glass and somebody had dropped it.’ I chose to use ‘as’. In order for it to be a simile, it must contain ‘like’ or ‘as’.
Hope this helped.