check it 和 check it out 的差別在哪裡？如果不好說明，請提供一些例句。

These are quite different.

I will check it.
- I will go make sure that something has been done properly.

You do the question, and then I’ll check it.
Go check that the door is locked.

I will check it out.
- I will take a look at the thing.

My friend told me Citizen Kane is a great movie, so I’m going to check it out.
Do you want to go check out that new restaurant this weekend?