Unit 19 Modern agriculture 第三課時教案
unit 19 modern agriculture 第三課時教案
i. teaching aims:
learn to use “it ” for emphasis.
similar dialogue presentation with new words and expressions used within
ii. teaching aids: slide, pictures
step i revision
step ii word study
finish the exercises in student book, page 47.
step iii practice
let ss finish the exercises “vocabulary, 1-3” in page 108, workbook
step iv grammar
1. give ss some sentences to translate into chinese and find out difference and sameness among these sentences (slide show)
it is on this arable land that the farmers produce food for the whole population of china.
it was from the early 1990s that scientists started to develop new techniques to increase agricultural production without harming the environment.
it was they who/that cleaned the classroom yesterday.
it was in the street that i met her father.
it was the goat’s eyes that he had seen in the darkness.
2.teach ss to find out the phrase from the sentence above----it is+被強調部分+that/who…
translate the following sentences into english:
1.寫這本書的人就是瑪麗。it is mary who wrote this book.
2.這個就是長滿了美麗的鮮花的花園。it is garden that many beautiful flowers grow in.
3.她就是擅長唱歌的女孩。it is a girl who is good at singing.
4.那就是他叔叔移居紐約的季節。it was for this reason that his uncle moved out of new york.
5. 錯的人是我。 it is i who am wrong.
4. note:
a. 在強調句型中，若被強調部分指人，可以用關系代詞who或that；若被強調的是狀語，只能用that，不能用when或where。
b. 注意與“it is /was…that +clause”主語從句的區別。
強調句型與it作形式主語，that從句作真正主語十分相似，但主語從句中it is /was后通常用名詞或形容詞作表語。強調句型中it is /was后是對主語、賓語或狀語的強調成分。
5. let ss find out some sentence with ‘it’ in the text ‘modern agriculture’.
it is on this arable land that the farmers produce food for the whole population of china. (paragraph 1)
it was from the early 1990s that scientists started to develop new techniques to increase agricultural production without harming the environment. (paragraph 2)
it was developed using a technique know as gm. (paragraph 4) (it is not for emphasis)
3. exercises
let ss finish the exercises in student’s book, page 47-48, e 1-2.
let ss finish the exercises in workbook, page 109, e 1-3.
finish all the exercises in the book.