(
课件网) Play by the rules Unit 5 Understanding ideas— Grammar By the end of the class, we will be able to： 1. perceive the form and understand the meaning of infinitive of purpose. 2. summarise the grammar rules of the infinitive of purpose. 3. use the infinitive of purpose to tell a story about following rules and realise the importance of following rules. 4. use the key language points and the infinitive of purpose correctly in real-life context. Learning Objectives Perceive the form What do they have in common I got on the train to go home. I went to a quiet area in order to read. I covered my ears in order to block the noise. I covered my nose so as to reduce the smell. I turned around so as to see the other passengers’ faces. They all have the structure: _____. We call it _____. to do sth to-infinitive I got on the train to go home. I went to a quiet area in order to read. I covered my nose so as to reduce the smell. Understand the meaning When can we use to-infinitive We use to-infinitive to express our purposes. infinitive of purpose I got on the train. I wanted to go home. I went to a quiet area. I wanted to read. I covered my nose. I hoped to reduce the smell. These are all my _____. purposes Observe the rule 1 We can use to, in order to, so as to to express our purposes, but what’s the difference I got on the train to go home. I went to a quiet area in order to read. I covered my nose so as to reduce the smell. To go home, I got on the train. In order to read, I went to a quiet area. We can put “to/in order to-infinitive” in both the _____ and the _____. When it’s in the beginning, we should use a “_____”. But we can only put “so as to-infinitive” in the _____. beginning middle middle , Practice Rewrite the sentences with to, in order to or so as to. 1. People wear seat belts in cars. People want to stay safe on the road. 2. Sally arrived at the train station before 6:00 am. She needed to catch the earliest train. 3. I listened carefully in maths class. I hope to improve my grades. People wear seat belts in cars to/in order to/so as to stay safe on the road. Sally arrived at the train station before 6:00 am to/in order to/so as to catch the earliest train. I listened carefully in maths class to/in order to/so as to improve my grades. To/In order to stay safe on the road, people wear seat belts in cars. To/In order to catch the earliest train, Sally arrived at the train station before 6:00 am. To/In order to improve my grades, I listened carefully in maths class. /belt/ / ste n/ Observe the rule 2 I went to a quiet area in order to read. I covered my nose so as to reduce the smell. I put on the coat in order not to catch a cold. I covered my ears so as not to hear the loud music. positive form negative form The “in order to/so as to-infinitive” also has the negative form. We only need to add a “_____” before “_____”. not to Complete the letter to Story Aunt, using ... ...
