青蛙的一生PPT学习教案.pptx

会计学
1
青蛙的一生
Do you know something about frogs？
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1. Adult frogs  lay eggs   in spring.  about two weeks ,  tadpoles come out . five weeks old, they have  back legs.  ten weeks old ,they have  front  legs,  too.  tails become short and then they become  froglets.  frog lets eat small animals and then become young frogs.  live on land for two or three years and then become  adult frogs. 
 they go back to water to lay eggs.
The life cycle of a frog
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Adult Frogs
 frogs lay eggs in spring.
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Tadpoles
tadpoles
 about two weeks , eggs become .
have back legs
 five weeks old, they .
have front legs
 ten weeks old ,they  ，too.
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I. Read the passage and write T(true) or F(fales).
朗读短文，判断正误。
 
2. After about two weeks , tadpoles come out.
3. About five weeks old, they have back legs.
4. About ten weeks old ,they have front legs, too.
( ) About five weeks old, they have front legs.
( ) About ten weeks old, they have back legs.
F
F
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 tails become short and then they become froglets.
Frogs
 live on land for two or three years and then become
 adult frogs.
 froglets eat small animals and then become young frogs
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and choose the correct words to complete the passage. 听录音，选择正确的单词补全短文。
 live on land for two or three years young frogs
animals froglets adult frogs
tails become short and then they become _______.
froglets eat small ________ and then become ___________.
 
_______________________________and then become _____________.
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spring
eggs become tadpoles
about two weeks
adult frogs lay eggs
five weeks
they become adult frogs
ten weeks
tadpoles have