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北师大2003课标版《Lesson 3 The Sea World》集体备课PPT课件优质课下载
tell the rules of making comparison;
use the structures to make comparison.
Ask students to do exercise5 of the textbook on page13.
Structure & meaning
They have a huge mouth and can eat fish as big as themselves.
The tiniest fish is not as big as a fly in your house.
和……一样……
不如……
同级表达形式：(not) as + 原形 + as
What do they have in common?
as big as
not as big as
Practice
他捕了一条和自己一样大的鱼。
He caught a fish as big as himself.
The fish he caught is as big as himself.
Practice
A shark is not as friendly as a dolphin.
鲨鱼可没海豚那么友善。
比较级表达形式：原形+er；
more / less +原形
Crabs are smaller creatures in the sea.
Penguins are more friendly than seals.
Flying fish are less colorful than some other fish.
Structure & meaning