Say negative sentences in pairs. Student A: say the words. Student B: say the sentence. Look at the photos on page 38 to check your answers. Then swap roles.

Alright, let's form the negative sentences for each pair of words. Remember, in the present continuous negative form, we use 'is not/are not/am not' + the verb with '-ing'.

1. A: Tom / eat a hamburger
B: Tom isn't eating a hamburger.
2. A: Elena / take a photo
B: Elena isn't taking a photo.
3. A: The man / wear a blue T-shirt
B: The man isn't wearing a blue T-shirt.
4. A: The waitress / ask the man for his autograph
B: The waitress isn't asking the man for his autograph.
5. A: Amy / surf the Internet
B: Amy isn't surfing the Internet.
6. A: Elena and Amy / talk to the man
B: Elena and Amy aren't talking to the man.

Explanation:
* We use 'isn't' (is not) with singular subjects like 'Tom', 'Elena', 'The man', or 'The waitress'.
* We use 'aren't' (are not) with plural subjects like 'Elena and Amy'.
* We form negative present continuous statements by adding 'not' after the helping verb (is/are) and before the present participle (-ing form) of the main verb.