人教版九年级unit1语法课课件.ppt
Section AGrammar FocusRead these sentences paying attention to the underlined parts. I study by working with a group. Do you learn English by watching videos? Try to guess a words meaning by reading the sentences before and after it. You can become better by reading something you enjoy every day. “by + 动名词动名词”常常表示手段、方式或方常常表示手段、方式或方法，可以用来回答法，可以用来回答how引导的特殊疑问句。引导的特殊疑问句。- How do you learn English?- I learn English by watching English movies.How do you practice speaking?By having conversations with friends.How do you learn new words?By making word cards.How do you improve your writing?By writing e-mails to my pen pals.How do you practice listening?By listening to a tape and repeating out loud.How do you improve your pronunciation?By watching English programs.How do you learn grammar?By taking notes, doing exercises and reading a lot.How do you improve your writing?By writing diaries in English.How often do you write a diary?How do you improve your listening?By listening to VOA.How often do you listen to VOA?How do you keep healthy?By exercising.How often do you exercise? Lin Lin often practices English _ chatting with her American friends. A. in B. by C. for D. with【解析【解析】选选B。句意：林林经常通过和美国。句意：林林经常通过和美国朋友聊天练习英语。朋友聊天练习英语。我通过向老师求助学习。我通过向老师求助学习。I study by asking the teacher for help.We learn English by _ (make) vocabulary lists making1.我们通过利用太阳的光和热使植物长我们通过利用太阳的光和热使植物长地好。地好。2. 现在人们利用手机来进行交流。现在人们利用手机来进行交流。 Translate the sentences into English.We can make plants grow well by using the light and heat from the sun.Now people can communicate with each other by using cell phones.3. Lily通过少吃减肥吗？不，不是的。通过少吃减肥吗？不，不是的。 4. 中国人通过植树来使环境越来越美丽。中国人通过植树来使环境越来越美丽。 Does Lucy lose weight by eating less food? No, she doesnt.Chinese people make the environments more and more beautiful by planting trees. by 的用法的用法 介词介词, 表示表示“通过通过方法方法或途径的意或途径的意思思”, 译成译成“靠靠, 通过通过”, 后面可加名词、后面可加名词、名词短语或动名词。可用来回答名词短语或动名词。可用来回答how引导引导的特殊疑问句。的特殊疑问句。 1) The house was destroyed by fire. 房屋被火烧毁了。房屋被火烧毁了。2) travel by air / land / sea 航空（陆路，航海）旅行航空（陆路，航海）旅行3) go by train / boat / bus 乘火车（船，公共汽车）乘火车（船，公共汽车）4) shake sb. by the hand 和某人握手和某人握手5) I study English by watching English movies. 我通过看英文电影学英语。我通过看英文电影学英语。 另外另外, by作为介词的意义有很多作为介词的意义有很多, 例如例如: 1）在）在旁边，靠近旁边，靠近 There is a power station by the river. 河边有一个电厂。河边有一个电厂。 2）沿着，经由）沿着，经由 to enter by the door 由门进去由门进去 3）由于）由于 by mistake 由于差错；错误地由于差错；错误地 4）被，由）被，由 some articles written by Lu Xun 一些由鲁迅写的文章一些由鲁迅写的文章 5）表示相（乘）除（以计算面积）表示相（乘）除（以计算面积） a room 5m by 4m 一间长五米宽四米的房间一间长五米宽四米的房间 6）逐一；连续）逐一；连续 one by one 一个接一个一个接一个 英汉互译英汉互译I study English by listening to tapes. (通过听录通过听录音带音带) by studying with a group. ( ) by watching English programs on TV. ( ) by taking part in English classes after school. ( )通过小组学习通过小组学习 通过看英文电视节目通过看英文电视节目通过放学后上英语班通过放学后上英语班I study English _(通过读英文通过读英文杂志杂志)._(通过读教科通过读教科书书)._(通过认真完通过认真完成家庭作业成家庭作业). by reading English magazines by reading the textbookby doing homework carefully用用by的相关短语完成句子的相关短语完成句子1. I think the best way to learn English is _ (通过大声朗读通过大声朗读). 2. He usually goes to work _ (乘地铁乘地铁). 3. First walk _ (经过银行旁边经过银行旁边), and then turn left. by reading aloudby the bankby subway4. Can we sit _ (在窗子旁边在窗子旁边)? 5. You must be back home _ (到十到十点为止点为止). 6. There are lots of trees _ (沿河沿河). 7. You must do your homework _ （你自己（你自己). 8. English is widely used _ (被人们被人们) all over the world. by the windowby ten oclockby the riverby yourselfby people【2011四川德阳四川德阳】2. How do you study for a test? - _ working with friends. A. By B. With C. On答案：答案： A【解析】本题考查介词【解析】本题考查介词by的用法。的用法。by意为意为“通通过过方式方式”；with意为意为“和和在一起在一起”；on意为意为“朝朝,向向”.句意句意“你是怎么为考试作准你是怎么为考试作准备吗？备吗？”“”“通过和朋友一起学习。通过和朋友一起学习。”只有只有by具具有有“通过通过方式方式”的意思，故选的意思，故选A。
