5.Read the following situations and think about what you’ll say to them, using ‘must’ and ‘mustn’t’.

4.Ask students for sample sentences and write them on the board.

3.Go through the examples on page 99& 100, referring to the degrees of necessity.

2.Summary　 should, should not/ shouldn’t

A.表义务，意为“应该”(某件事宜于做)，用于各种人称。

You should be polite to your teachers.　 你对老师应该有礼貌。

B.表推测，意为“想必一定、照说应该、估计”等。

They should be home now.　 照说他们现在应该已经到家了。

Step1　 Revision　 giving instructions

Try to link them to the context the Ss in Beijing Sunshine Secondary School are talking about how to be a good student. It is useful to point out to students that we can use these modals to give instructions.

Step2　 Presentation

Talk about “How to look after your pet? ”

1. Read the following situations and think about what you’ll say to them, using ‘should’ and ‘shouldn’t’.

PPT

2.Use these words properly in different situations

1.Tell the differences between should, must

2.Use ‘must/mustn’t’ to tell people that it is necessary or very important to do/not to do something

1.Learn to give advice and tell people what is the best or right thing to do with ‘should/ shouldn’t’