人教版八年级英语下册《I’ll help to clean up the city parks》PPT课件(第2课时)，共33页。
Lead-in
Have you ever been a volunteer? What did you do?
Read the article and answer the questions.
1. What does Mario love?
He loves animals.
2. What does Mary love?
She loves reading books.
3. Where did they volunteer to work?
Mario volunteered to work at an animal hospital.
Mary volunteered for a volunteer after-school reading program.
4. What did they do there?
Mario cared for the animals.
Mary helped kids learn to read.
Language points
1. Mario Green and Mary Brown from Riverside High School give up several hours each week to help others.
from River High School 为介词短语作后置修饰语，翻译时应提前。
to help others 作目的状语。是“每周拿出几个小时”的目的。
2. Mario believes it can help him to get his future dream job. 马里奥相信这会帮助他获得他的梦想职业。
help sb. (to) do sth. 帮助某人做某事；
help后的不定式符号to，可以省略。
e.g. Mike called on his sister to help him look for his lost keys.
迈克叫上他妹妹帮助他找钥匙。
动词不定式
1.动词不定式的形式
动词不定式的基本形式是“to+动词原形”，使用时有时可以不带to。动词不定式没有人称和数的变化，在句子中不能作谓语，但仍保留动词的特点，即可以有自己的宾语和状语。动词不定式同它的宾语或状语构成动词不定式短语。
动词不定式的否定形式是在动词不定式前面加not。
2.动词不定式的用法
(1)不定式作主语:不定式作主语一般位于句首，谓语动词用单数。
为了避免句子“头重脚轻”，往往用it代替不定式作形式主语，而将不定式放在后面作真正的主语。
(2)不定式作表语
我的工作是照顾那个生病的男孩。
My work is to take care of the sick boy.
(3)不定式作宾语
不定式作宾语有两种情况：一种是及物动词后直接跟带to的不定式，另一种是“及物动词+疑问词+带to的不定式”。
Exercise
I. Fill in the blanks using the words in the box.
several, feeling, owner, journey, satisfaction
1. I only want to sleep for _______ minutes.
2. The _______ from London to Oxford takes about an hour and a half.
3. The next morning, the _____ of the house prepared the breakfast for us.
4. He looked at his work with a smile of __________.
5. She enjoys the _______ of freedom.
… … …
关键词：《I’ll help to clean up the city parks》PPT课件免费下载，.PPT格式；
