Complete the Learn this! box with the verbs below. Then find examples of the rules in the text in exercise 2. (Hoàn thành phần Learn this! với các động từ dưới đây. Sau đó tìm ví dụ về các quy tắc trong văn bản ở bài 2.)

be supposed to

don’t have to, don’t need to, and needn’t

must and have to

mustn’t

should and ought to

LEARN THIS! Advice, obligation, and necessity

1. We use ________ to give advice.

2. We use ________ for obligation, strong advice or possibility.

3. We use ________ to say that something isn’t allowed or for strong negative advice.

4. We use ________ to express lack of obligation or necessity.

5. We use ________ to talk about rules and also about what people believe or expect.