Unit 3 A Healthy Life Period 3 Grammar –The Use of “It” (1)Learning aims: To master the structure and use of “it”Important point and difficult point: To learn to use “it” correctly and properly.使用说明及学法指导：1. 自我学习同步测练 P 的内容，完成预习案。 2. 完成时间 20 分钟。预习案 Previewing Case Task 1 课文原句填空并分析所填单词在句中所充当的成分。1．_________ is a beautiful day here and I am sitting under the big tree at the end of the garden. ( )2．________ seems amazing that at my age I am still fit enough to cycle 20 kilometers in an afternoon. ( )3．________is my birthday in two weeks time and I’ll be 82 years old! ( )4．Your mother tells me that you started smoking some time ago and now you are finding _______ difficult to give ______ up. ( )5 ． Believe me ， I know how easy __________is to begin smoking and how tough _________is to stop. ( )6．This means that after a while your body becomes accustomed to having nicotine in_________. ( )7 ． As you know ， if you do the same thing over and over again ， you begin to do _______ automatically. ( )8 ． I didn’t know ， for example ， that __________could do terrible damage to your heart and lungs or that __________was more difficult for smoking couples to become pregnant. ( )Task 2 分析下列句中 it 的用法。1. Tom's mother kept telling him that he should work harder but it didn't help. ( )2. —Who is knocking at the door? —It's me. ( )3. It is some 3000 kilometers from Beijing to Guangzhou. ( )4. It's getting colder and colder every day. ( )5. They watched the train until it disappeared in the distance. ( )小结：代词 it 的用法用法例句代替前文提过的东西或事情，避免重复Tom joined the army last month. Do you know about...
