外研社必修三Module4-Sandstorms-in-Asia课件.ppt

* * * * * * * * * * * * * * * * * * * * * 2021/3/14 * Finish the the exercise at Activity 4, Page33. Answers: prevent you (from) seeing the sun / strong enough to move sand dunes. 2. he experienced a terrible sandstorm. 3. because of desertification. 4. cause deserts and sand-storms to increase. 5. the thick dust makes it difficult to see / the drivers cannot see clearly. 6. prevent the desert coming nearer. 2021/3/14 * Complete these sentences: Activity 5 page33 1. Weather experts have f_________ another big sandstorm in a week’s time. 2. It’s f__________ to be outside in a sandstorm. 3. I was in a very big sandstorm some years ago. Luckily, everyone s_______. 4. There’s a lot of d____ on the floor. We need to sweep it away. 5. Desertification is a long p______ that takes many years. 6. Many Beijing c______ cycle to work. orcast(ed) rightening urvived ust rocess itizens 2021/3/14 * Grammar 1 -1. Observation I’m glad to meet you. She invited me to attend the meeting. The boy is old enough to go to school. to + 动词原形表示主动 2021/3/14 * Grammar 1 - 2. Observation There was nothing to be done. I’d like to be told what’s going on. Nothing is allowed to be taken out of the reading room. to be +动词的过去分词表示被动。 不定式一般式所表示的动作通常与谓语 所表示的动作或状态同时发生,或在它 之后发生。 2021/3/14 * Grammar 1 - 3. Observation To be cycling in a sandstorm is frightening. They pretended to be working hard when their boss passed them. to be + 动词ing; 不定式进行式表示动作正在进行,与谓语动词 表示的动作同时发生。 2021/3/14 * Grammar 1 -4. Observation I’m the only person in my family to have been in a sandstorm. 2. He is not likely to have got my letter. to have + 动词的过去分词 2021/3/14 * Grammar 1 -5. Observation To have been caught in a sandstorm is a terrible experience. 2. The room was said to have been cleaned. to + have been + 过去分词; 不定式完成式所表示的动作在谓语动词所 表示的动作之前发生。 2021/3/14 * Grammar 1 -6.Exercise  finish the exercise at Activity 2, Page 34. Answers: It is dangerous to trave during a sandstor