U4 Save the trees U4 词汇Vocabulary “讨论”, 2种表达 discuss= talk about 和某人讨论某事 discuss sth with sb 对抗... fight against for example与such as区别 for example: 可放句首句中句尾, 用逗号隔开; 举一例 such as=like: 放句中; 举多例；后加doing 给某人树立榜样 set an example to sb “吸收”，2个表达 take in= absorb 翻译take away；take care of；take part in；take off take away：拿走 take care of：照顾 take part in：参加 take off：起飞；脱衣服 对...有害 be harmful to...=be bad for... “生产；制造”，2种表达 produce= make “主要的”，2种表达 major= big and important “方便的”，2种表达 convenient= easier “来自”，2种表达 come from...= be from... “确切地说”，3种表达 in fact= actually= as a matter of fact 环顾四周 look around “由……制成”（能看出原材料） be made of 想象做某事 imagine + doing sth “大量的；数以百万计的” millions of... “疾病”，2种表达 disease= illness 对...有好处 be good for = be useful for v. “挖”；过去式；现在分词 dig-dug-digging 挖洞 dig a hole/holes vt. “搬；扛；背”；过去式；现在分词 carry-carried-carrying U4 语法Grammar 现在进行时 一、定义： 1. 说话时正在进行或发生的动作。 eg. The children are playing in the park now. 孩子们正在公园里玩耍。 现阶段一直持续的动作状态 eg. We are staying at Peter’s house at the moment. 我们正待在彼得家里。 结构: 肯定句：主语 + am/is/are+ doing eg. I am doing homework now. He is doing homework now. 否定句：主语 + am/is/are+ not+ doing eg. I am not doing homework now. He is not doing homework now. 一般疑问句：Am/Is/Are+主语+ doing 肯定回答: Yes, 主语 + am/is/are. 否定回答: No, 主语 + am/is/are+ not. eg. Are you doing homework now Yes, I am. /No, I’m not. Is he doing homework now Yes, he is. /No, he isn’t. 特殊疑问句：特殊疑问词+is/am/are+主语+ doing？ eg. He is doing homework in the bedroom. Who is doing homework in the bedroom What is he doing in the bedroom Where is he doing homework 动词-ing 变化规则： (1) 一般情况加-ing play--playing watch--watching (2) 以不发音e 结尾，去e加-ing take--taking come--coming (3) 以辅+元+辅结尾的动词，双写尾字母再加-ing run--running swim--swimming get--getting shop--shopping -ie结尾变成-y再加-ing die--dying lie--lying 时间状语: 1. now，at present(现在)，at the moment(此刻)，at this time(此时)，right now(现在)，说明现在正在发生的事，用现在进行时 eg. Her brother is watching TV in his bedroom now. We're far from home. What are our parents doing at the moment 2. these +时间, this+时间，说明这一阶段正在发生的事，用现在进行时 eg. These days we are helping the farmers work on the farm. They're having a test this week. Mr. Cheng is visiting our village this month. 3. Look, Listen, Can't you see ，说明后面谓语动词的动作正在发生，用现在进行时 eg. Look! Maria and Tom are dancing under the tree. Listen! Our English teacher is singing the popular English song. Many children are swimming in the river. Can't you see 4. 根据上下文的暗示，句子的谓语动词可能应用现在进行时。 eg. (1) — Where is Mr. Wang — Oh, he is reading a newspaper in the office. (2) — Is that boy Jack ... ...
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