Unit 6 When was it invented 知识点 2022-2023学年人教版英语九年级全册

Unit 6 When was it invented?(A) 回顾：一般现在时的被动语态 “am/is/are +及物动词的过去分词” 语法: 一般过去时的被动语态 1.一般过去时的被动语态的谓语动词“was/were +及物动词的过去分词” 2.一般过去时的时间标志词： yesterday，the day before yesterday, .....ago, last (week, month, year, night ....)，just now 等 3.注意事项 1）含双宾语的主动结构变成被动结构时，不要忽略间接宾语前的介词。 We gave some flowers to Miss Gao on Teachers’ Day. (双宾语： give sb. sth.= give sth. to sb. 结构) 被动： Some flowers was given to Miss Gao on Teachers’ Day (by us). 2) 含有动词短语的主动语态变被动语态时，不要漏掉短语中的介词或副词。 We handed in our homework last Friday. 被动： Our homework were handed in last Friday （by us）. 3) 在含有使役动词 make 或感官动词（see, watch , notice , hear 等） 的主动语态的句子中，这些词后常跟省略to 的动词不定式， 但是改为被动时，要把省略的to 加上 make 的用法 make sb. do sth. 使某人做某事 see, watch , notice , hear的用法 see, watch , notice , hear sb. do sth. 看到某人做某事 I saw him cross the road and enter the shop. 被动：He was seen to cross the road and enter the shop ( by me ). 4.相应练习：（把主动形式变成被动形式） 1).He sent an email to Mary last night. __________________________________________________________ 2).We planted many trees last year. ___________________________________________________________ 3).Many people visited our school yesterday. ______________________________________________________ 4).This strange cup was used for keeping water warm. （改为一般疑问句) ______ this strange cup ______ for keeping water warm? The short novel was written by Lu Xun. (对划线部分提问） _____ ______ the short novel ______ ______? Many trees were planted along the river last year.(改为否定句) Many trees______ ______ along the river last year. 重点知识点 1. 2a 词组 shoes with special heels 带特殊轮子的鞋 shoes with lights 带灯的鞋 runs on electricity 靠电力运行 2. What are they used for?（2c） be used for (doing ) sth. = be used to do sth. 被用来做某事 （主动形式 use sth. to do sth.） 例：I use the knife to cut the paper. --- 被动 ：The knife was used to cut the paper. 3.（P43 知识点） 1. by accident=by chance 意外地，偶然(3a) 2. It is said that a Chinese ruler called Shen Nong was the first to discover tea