He acted foolishly and was laughed at by everyone.

He is really a fool, isn't he?

He is behaving like a fool.

Let's go watch a movie together!

Let's all work hard together to make the project a success.

Let's go to the park with everyone.

I couldn't understand his actions.

He started to act immediately.

He laughed a lot when he heard the joke.

He is my best friend.