人教版八年级英语下册 《What's the highest mountain in the world?》SectionB PPT课件(第1课时)

人教版八年级英语下册《What's the highest mountain in the world?》SectionB PPT课件(第1课时)，共10页。

weigh的用法

①作及物动词，表示“称……的重量”。

eg：Cao Cong thought of a way to weigh the elephant.曹冲想出了一个称大象的办法。

②作不及物动词，表示“量”，后接数字。

eg：She weighs 50 kilos.她的体重是50千克。

【拓展】weight名词，意为“体重；重量”。

倍数表达法

❶用形容词表示甲是乙的几倍时，有以下三个句型：

①倍数＋形容词/副词比较级＋than

eg：This hall is four times bigger than my classroom.这个大厅比我们的教室大四倍。

②倍数＋as＋形容词/副词＋as

eg：Asia is four times as large as Europe.亚洲的面积是欧洲的四倍。

③倍数＋the size (height，length...)of

eg：The hill is four times the height of that small one.这座山的高度是那座小山的四倍。

❷用名词表示“量”的倍数时，有以下两个句型：

①倍数＋more＋名词＋than

eg：There are four times more books in our library than in yours.我们图书馆的藏书(数量)是你们图书馆的四倍。

②倍数＋as many/much＋名词＋其他＋as

eg：This is three times as much water in this cup as in that one.这个杯子里的水(量)是那个杯子里的三倍。

重点短语归纳

at birth出生时

live up to活到…… 

一、根据句意，选择方框中的单词并用其适当形式填空。

1．Mom，I can look after myself well，I am already an _______now.

2．That elephant _______about 5，000 kilos.

3．Baby pandas doesn't have any ______．

4．—Are pandas very small at______?

—Yes，and people need to take care of them very carefully.

5．The _______cars people drive，the ______pollution there will be.

二、单项选择。

( )6.—Linda，you look thinner.How much do you ________ now?

—About 50 kilos.

A．develop　　　　B．rise　 　　　C．drop　 　　　D．weigh

( )7.I know ________ about Jinzhou than you，so tell me some please.

A．little  B．more  C．less  D．much

( )8.My pet dog feels like standing ________ his two legs.

A．in  B．by  C．on  D．of

... ... ...

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