piano什么意思:人教版英语七下Unit4单词、知识梳理、词汇句式精讲( 五 )

He often helps me (to) clean the classroom.
他经常帮助我打扫教室。
拓展：help既可以做动词也可以是名词，常见的其他用法有
1）help sb. with sth. 意为“帮助某人做某事”，with后可以跟名词。例如：
I often help him with his lessons. 我经常帮他做功课。
2）with one’s help 意为“在某人的帮助下” 。例如：
With my teacher’s help, I passed the exam.
在老师的帮助下，我通过了考试。
3）help oneself to… 意为“请随便用……” 。例如：
Please help yourselves to some fish. 请随便吃些鱼吧。
3. I have to keep my hair short.
“keep +sb./sth.+形容词”表示“使某人或者某物保持某种状态” 。此句式中的keep是动词，意为“保留，保存，保持” 。例如：
Too much work keeps me busy and tired.
太多的工作让我忙碌而且疲惫。
We must keep the class clean.
我们必须保持教室干净。
拓展：keep常见的其他用法
1）“keep + 形容词”，意为“保持某种状态” 。例如：
Keep quiet, please! 请保持安静!
2）“keep sb. doing sth.”表示“让某人继续/不断地做某事” 。例如：
He kept me waiting for an hour. 他让我等了一个小时。
4. …because I have to/must learn to play the piano.
此句中的learn是及物动词，意为“学习，学会” 。“learn（how）to do sth.”意为“学会，学习（如何）做某事” 。例如：
You must learn (how) to drive a car. 你必须学会怎样开车。
Last year, I learnt how to swim. 去年我学会了游泳。
拓展：learn 的其他用法
1）learn from 意为“向……学习” 。例如：
We must learn from Lei Feng. 我们必须向雷锋学习。
2）learn by oneself 意为“自学” 。例如：
He learns English by himself. 他自学英语。
3）用于某些谚语中。例如：
It’s never too old to learn. 活到老，学到老。
5. Don’t leave the dirty dishes in the kitchen!
1）leave 作动词，意为“留下，搁置，不马上做，不马上处理” 。“leave sth./sb. + 地点” 可以表示“把某人/某物留在或者落在某地” 。“leave sth./sb. + 时间”可以表示“把某事搁置到某时” 。例如：
I left my pen in the classroom. 我把钢笔落在教室了。
John always leaves his dirty clothes in his bedroom.
约翰总是把他的脏衣服留在卧室。
He often leaves the things till next day. 他总是把事情留到第二天。
注意：leave sb. by oneself 意为把某人独自留下例如：
They are busy with work and always leave their son home by himself. 他们忙于工作并且总是把他们的儿子独自留在家里。
2）leave 还可用在及物动词或者不及物动词表示“离开，出发”，“leave for”意为“出发去某地” 。例如：
The plane leaves for Beijing at 2 p.m.. 飞机下午两点起飞去北京。
Mr. Smith left two minutes ago. 史密斯先生两分钟前离开了。
练一练：
Ⅰ. 仔细阅读对话，选择方框内的句子填空格，使对话意思连贯正确。
A：there are many rules in our school.
B：You are welcome.
C：Excuse me. Where are you from?
D：Yes, you are right.
E：Can we listen to music in the classroom?
F：No, thank you.
G：Sorry, we can’t.
A： 1 ?
B: I am from Canada. And my name is Alice.
A: Welcome. Well, 2 . Do you know them?
B: Oh, no. Can you tell me, please?
A: OK!
B: Do we have to wear a uniform every day?
A: Yes, we do.
B: 3 ?
A: No, we can’t. But we can listen to it outside.
B: Can we watch TV on school nights?
A: 4 .
B: Do we have to go to bed by 10:00 at night?

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