Unit-9-分数的英语表示和用法人教版英语八年级下册教学课件

1、Unit 9 Have you ever been to a museum?（1）分数的英语表示和用法（2）have gone to, have been to, have been in的区别人教版英语八级下册 分数的英语表示和用法一、 分数的表示 分数表示的口诀 分子在前，分母在后， 分子用基数词, 分母用序数词, 分子大于一, 分母加+s。e.g. 1/3onethird2/3twothird3/4threefourth7/8seveneighths ss分数表示的特殊情况1/2 one second a half1/4 one fourth a / one quarter3/4 thr

2、ee fourths three quarters二、分数的用法：分数可以修饰名词， “分数+of+名词复数”作主语时，谓语动词用复数形式。“分数+of+名词单数/不可数名词”作主语时，谓语动词用单数形式。e.g.1. This is a big class, and two thirds of the students are girls. 2. A half of the boys in our class play basketball every day.3.Three fourths of the bag is wet. 4. About one tenth of the water

3、 in our school is wasted.Choose the right answers ( ) 1. In China, about _ of people _ in the country. A. three fifth ; live B. third fifth ; lives C. three fifths ; live D. three fifths; lives ( ) 2. Now _of business letters _ written in English. A. two third ; are B. two thirds ; are C. two three

4、; is D. second three; is ( )3. _of the milk _ water. A. One second; is B. One two; are C. second one; is D. Third one; areCBAhave gone to, have been to, have been in 的区别They have been in Tibet（1） They have been to Tibet（2） They have gone to Tibet（3） been是be的过去分词gone是go的过去分词他们都表示去某个地方。都是现在完成时表明动作已经发生

5、，但含义不同区别AB 表示某人曾去过某地（现在已经回来了）He has been to America twice. 他去过美国两次了I have ever been to the Great Wall. 我曾经去过长城 havehas been to标志性词难点讲解havehas been to 标志性词一、经常和表示次数的词连用，如once,twice times等，表示“去过某地几次”My father has been to Beijing twice. 我父亲去过北京两次二、可和just,never,ever,等连用。They have just been to Beijing他们刚

6、刚去过北京I have never been to the Great Wall.我从未去过长城havehas gone toAB表示某人在去某地的途中或到了某地（现在还没有回来双方说话时第三人不在现场）Where is Jim? Jam去了哪里？He has gone to England. 他去英国了一般不用第一和第二人称做主语havehas been inAB表示在某地待了多久，强调从过去到现在一直待在某地 She has been in Beijing for nearly two weeks.（此时仍在北京）她在北京已经两周了How long have you been in the

7、 factory?你在工厂多长时间了？注意遇到这四个地点副词要去掉to,这四个地点副词是here, there ,home, abordMary is not here.She has gone home玛丽不在这里，她回家了I have been abroad twice 我去过两次国外了Have you ever been there你去过哪里吗？课堂练习用 have/has been to have/has gone to havehas been in填空，完成下列句子。1. How do you like Qingdao?Very much. I Qingdao twice and its a beautiful city.2. Wheres your father,Rita?He India.3.-Mr.Brown Shanghaiforthreedays.have been to has gone to hasbeeninsummaryhavehas been +地点 曾去过某地，已经回来了havehas gone to+地