Unit 4 Inventions and Inventors

paper is made from trees.
8. be used for/by
a saw is used for cutting wood.
a microwave oven is used for heating food.
chalk is used by teachers.
this notebook was used by my mother.
 
［課堂練習］
用be used for/by  or  be make of/from 補全句子：
1. spoons and forks                      eating in the west.
2. greenhouse                                      keeping the vegetables warm.
3. bamboo                            chinese             writing characters.
4. you’d better use bags                 cloth instead of bags                       plastic.
5. the beautiful lights                        crystal glass.
6. soap                         animals’ oil.
 
句型轉換：
1. cai lun invented paper in 105 ad . （變成被動句）
2. people grow r ice in south china. （變成被動句）
3. china will hold the 29th olympic games .（變成被動句）
4. people must lock their bikes . （變成被動句）
5. gunpowder was discovered by the chinese. （變一般疑問句）
6. very few people will be killed in car accident in the future. （變否定句）
7. tea-drinking was first recorded in china about 2737 bc. （對畫線部分提問）
【本講教育信息】
一. 教學內容：
book 15 unit 4 (ii)
復習被動語態，學會使用被動語態描述事物的使用，構成和功能；學會用情態動詞表達懷疑，確定和可能。
 
二. 本周教學重點：
1. 復習被動語態
2. 情態動詞表達懷疑、確定和可能。
3. 重點詞匯
 
三. 具體內容：
（一）被動語態：
1. 一般現在時被動語態基本結構：
主語＋am/is/are＋過去分詞
the food is placed in the oven.
they are turned into heat.
2. 一般過去時被動語態基本結構：
主語＋was/were＋過去分詞
magic squares were invented in china.
papermaking was introduced into japan in 610.