English slogans in the library can't take books away.

We must obey the librarian there.

We must abide by the library rules.

We must abide by the rules of the library.

You are in the library. You must obey the library rules. You can't smoke. You can't dirty the floor.

When you arrive at the library, you must obey the rules of the library. You can't smoke and throw things on the floor.

You must abide by the rules of the library.

You must obey the rules of the library.

You can't talk loudly in the library.

You can't talk loudly in the library.

We must keep quiet in the library, so you can't talk.

We must keep quiet in the library, so you can't talk.

7. Do you have to? Keep quiet. You must keep quiet.

8. You must return the book on time.

You must return the borrowed books to the library on time.

9. You must put this book back on the right shelf after reading it.

When you finish reading it, you must put it back on the right shelf.

You can't draw or write anything on this page.

Don't scribble on the book.