The environment-Period 5　Grammar and usage教案

牛津译林版   必修五  Unit 2

The General Idea of This Period

In this period we will learn the usage of verb-ing form as an adverb.First we’ll give time for the students to read and think over the contents in Page 30.Let them know a verb-ing can be used as adverbial to express time,reason,result,accompaniment and condition.We have to pay attention to the differences between“doing”and“having done”,the place of“not”,helping the students use verb-ing properly.Certainly,we will focus on the practice of the grammar.Learn to use by using.By reading the last part of the conversation between the environmentalist and the economist,we will have a more clear map of what their opinions about the environmental protection is.The students are asked to rewrite adverbial clauses into verb-ing to have more practice.

Step 2　Lead-in

T:Last period we learned verb-ing used as an adjective.Today,we will talk about the usage of verb-ing used as an adverb.Now,please open your books to Page 30.Read and pay attention to the words after the black spots and the words in blue to see how verb-ing form here is used like an adverb,what they can express.(When the students read Page 30,the teacher walks around the class to help solve any problems the students may raise.)

Step 3　Grammar

 (After the students finish the task,)OK,I’ll show you some sentences to find if you really catch it.

Show the following on the screen

1.Having finished their job,they went to the seashore for a relaxation.

2.He stood there,reading a book.