We already know we can use了le to indicate a completed action, the word 过guò can be used in the similar model，but 过 emphasizes more on the completion, that the action has been done. Let’s see some examples to understand more directly, 你 吃 饭 了 吗？Nǐ chī fàn le ma ？Have you eaten? 吃 过 了。/吃 了。Chī guò le....
