Go do something on your own, and leave your kids alone sometimes.

你完全可以去做你自己的事情，让孩子自己呆一会儿。

You monkey around with something when you do not know what you are doing. You are touching or playing with something you should leave alone.

当你不知道自己在干什么时，就说你是monkey around with something，你正在触碰或把玩一些你应该放下的东西。

Back at school, Sayaka confronts Ai at the soccer field or something and asks her to leave her and WG alone.

回到学校，面对早矢香在足球场上什么的爱，叫她单独离开她和工作组。

Don't leave her alone. She might do something stupid.

别让她一个人呆着。她也许会干蠢事的。

If a friend keeps asking you to do something you do not want to do, you might ask him to leave you alone or "stop bugging me."

如果一个朋友一直要你做你不想做的事，你可以跟他说：让我自己待会或是“别来烦我”。