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Where can I borrow the book?
Who can I ask for help?
How can I borrow books?
the library
types of books
the librarian(图书管理员)
library rules
Brainstorm: dos and don'ts in the library
Library rules
We must keep quiet.
They must keep the books clean and tidy.
Everyone must return the books on time.
You mustn't eat or drink in the library.
She mustn't write or draw in the books.
He mustn't take magazines out of the room.
A. The speaker feels that something is necessary.
B. Something is not allowed (允许).
must/mustn't/have to/don't have to
--________ I return the books in two days?
--No, you ________________________________. But if you want to keep them longer, you _______ renew them.
Must
don't have to/don't need to/needn't
have to
A. It’s not necessary to do something.
She ________________ bring her student card every time she goes to the library. But she ___________ remember to bring
her library card.
doesn't have to
has to
B. The situation(客观条件) makes something necessary.
Tip: have to has different forms.