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1、Unit4 Grammar一、教学目标1. 正确熟练地运用从句和简单句。2. 掌握简单句和复合句之间的转换。二、教学内容掌握词汇：aware, circle, agreement, distance, possibility, alien, stranger。词组：as tasty as, remind of, how far, be away from, two earth years, circle around the Sun. work hard, come true, be different from, try to do, be similar to, sign of, be h
2、appy to do, indoor playground, the football field, the same as, hear from。句型：(1)People might float in space because of the low gravity.(2)Humans cannot survive without food, water, or oxygen.(3)The smell of the pills reminds them of the tasty food on the Earth.(4)It takes Mars about two Earth years
3、to circle around the Sun once.(5)I wonder how many people would like to move to Mars.(6)It is difficult to breathe on a planet that has much thinner air than that on the Earth.三、重点难点1. 正确熟练地运用从句和简单句。2. 掌握简单句和复合句之间的转换。四、教学过程Step 1 RevisionMake sentences with at the age of, because of, without.eg: I c
4、ould ride a bike at the age of five.He didnt go to school because of his serious illness.Fishes can not live without water.Step 2 Learning Part A1. Tell students that we can rewrite adverbial clauses in simple sentences with preposition phrases beginning with at the age of, because of and without.I
5、could rick a bike when I was five years old. =I could ride a bike at the age of five.He didnt go to school because he had a badly ill. = He didnt go to school because of his serious illness.Fishes can not live if there is no water = Fishes can not live without water.2. Ask students to do the exercis
6、e on P56 in pairs or on their own. Check the answers with the whole class.(1)Neil Armstrong took his first flight at the age of six.(2)Yuri Gagarin became the first man to go into outer space when he was seventeen years old.(3)People might move to another planet in the future because of the bad popu
7、lation.(4)Meals will not be as tasty as they are today without the fresh food.(5)It would be funny to play football on Mars because there are low gravity.(6)If there isnt special boots, we cannot walk on Mars.Step 3 Learning Part BTell the students that we can rewrite some object clauses in simple s
8、entences with prepositions like of and about.Ask students to do the exercise on P57 in pairs or on their own. Check the answers with the whole class.1. Are you aware of the distance from Mars to the Sun? (be aware of)2. Do scientists agree with the possibility of living on Mars?3. Do they thought ab
9、out the low gravity problems on Mars?4. Are you aware of the transports on Mars?5. I wonder about the number of the people who would like to move to Mars.6. I think people should know about the differences between Mars life and the Earth life.Step 4 Learning Part CRemind the students that rewrite so
10、me defining relative clauses in simple sentences with prepositions like with and in. Let the students do the exercise on P58 in pairs and check their answers.1. Mars is a planet with an environment similar to the Earth.2. Astronauts in space suits and helmets might stay on Mars for hours.3. It is di
11、fficult to breathe on a planet with much thinner air.4. On Mars there might be people with air tanks on their backs.C21. Humans are. because of the serious pollution on the Earth.2. Many people do not doubt of the interesting life on Mars.3. We could not play football on Mars with the low gravity.4.
12、 Life would be boring for me without football.5. Maybe this problem with the same football fields as those on the Earth.Step 5 ConclusionThe students go through the knowledge according to the big screen.Step 6 Homework1. Review the grammar.2. Preview Integrated skills and Study skills.五、板书设计Unit4 Grammar1. Useful expressions:at the age of, because of, as . as, be sure about, be aware of, be different from, .2. Useful sentences:复合句和简单句之间的转换。