明日、楽しいことがあるから、早く寝る。って英語でなんて言うの？

1. I'm going to get some rest early becasue I have a fun activity tomorrow. The expression "get some rest" is another way to say I'm going to sleep early. 2. Tomorrow I have something fun to do, so I'm going to hit the sack early tonight. The expression "hit the sack" means to go to bed. Therefore, this sentences is saying that the person will go to bed early tonight because they want to get enough rest so they can carry out their plans for the next day.

In American English we use the word 'crash' informally to refer to sleep. We say something is a 'blast' if it is exciting or really fun.

If you "have plans," it means that you have a specific activity set for a specific time and date. "To go to bed" means to try/to go to sleep. I hope that this helps. :)

When you want to explain that you are going to sleep early today because you have something fun planned for the next day; then you can say this in the following ways: -I'm going to bed early tonight because I have fun plans for tomorrow -I am going to sleep early tonight because I'm doing something fun tomorrow

The two sentences you see provided above are excellent ways to express to your listener that you are going to bed early because you have something exciting you are doing the following day. In the first sentence you will notice the term hit the hay. This means to go to bed. This term is appropriate for informal settings, like talking with family or friends.