1. Review the grammar box. Ask students to say the questions and answers.

2. Talk about the two ways people give reasons for saying no to a invitation.

3.Call attention to "must" and "have to".

Step 3 While-task

Page 67,3a

1. Call attention to 3a,. Read the instructions to the class.

2. Ask students to read the phrases in the box and the five conversations quickly.

3. Ask students to complete the answers following the instructions.

1. Ask two students to act out the conversations they have just completed.

Page 67 , 3b

1. Call attention to3b.

2. Students complete the sentences with the words in brackets on their own.

3. Ask some pairs of students to present the conversations to the class.

Step 4 Post-task

　Page 67,3c.

1. Read .the instructions for this activity to the class.

2. Ask students to read the sample conversation.

3. Students complete the chart on the right.

4. Then invite classmates to your party. Make conversations following the sample in the box.

　Step 5 Homework

1. Review the grammar box.

2. Do the exercises on Page 61 in Students' book.

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