资源简介

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
— No, Jack is doing his homework in the classroom.
【注意】
表示情感状态、知觉认识、愿望或短暂性的动词不能用现在进行时态，而用一般现在时
【时态解题技巧】
先找时间状语
再判断时态
最后决定动词形式
U4 写作Writing
【话题】保护树木
【写作指导】
Para1: 总述树木的重要性
Para2: 树木的用途
Para3: 应采取的措施
【范文】请以“Trees are important”为题，根据表格中的提示写一篇80词左右的短文，说明树木对于人类的重要性。
开头已给出，但不计入总词数。
Trees are important
Trees are the biggest and oldest living things on Earth. They are very important for human beings and animals.
Trees are very useful. First, trees can keep the air cool and clean , they can make our environment more beautiful and keep us stay healthy. Second, trees can take in harmful gases
and keep the air fresh. Third, trees help fight against the pollution. Fourth, the trunk and branches provide us with wood so we can use wood to make many things. For example, much furniture is made of wood. Finally, trees can provide us with some food, such as fruit.
In short, trees are really helpful to us in many different ways. So it’s important for us to protect trees. First , we should stop cutting down so many trees and do our best to plant more
trees. Second, we had better use the both sides of the paper so that we can save wood.

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