青蛙的一生PPT課件

1、第1頁/共14頁Do you know something about frogs？第2頁/共14頁1. Adult frogs lay eggs in spring. 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. 5.Their tails become short and then they become froglets. 6.The frog lets e

2、at small animals and then become young frogs. 7.They live on land for two or three years and then become adult frogs. 8.Then they go back to water to lay eggs.The life cycle of a frog第3頁/共14頁Adult Frogs 1.Adult frogs lay eggs in spring.第4頁/共14頁Tadpolestadpoles 2.After about two weeks , eggs become .

3、have back legs3.About five weeks old, they .have front legs4.About ten weeks old ,they ，too.第5頁/共14頁I. Read the passage and write T(true) or F(fales). 朗讀短文，判斷正誤。 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,

4、too. ( ) About five weeks old, they have front legs. ( ) About ten weeks old, they have back legs.FF第6頁/共14頁5.Their tails become short and then they become froglets. Frogs7.They live on land for two or three years and then become adult frogs.6.The froglets eat small animals and then become young fro

5、gs 第7頁/共14頁II.Listen and choose the correct words to complete the passage. 聽錄音，聽錄音，選擇正確的單詞補(bǔ)全短文。選擇正確的單詞補(bǔ)全短文。 live on land for two or three years young frogsanimals froglets adult frogs 5.Their tails become short and then they become _. 6.The froglets eat small _ and then become _. 7.They _and then be

6、come _.第8頁/共14頁1.in spring eggs become tadpoles 2.after about two weeks adult frogs lay eggs3.about five weeksthey become adult frogs4.about ten weeks tadpoles have back legs5.two or three yearstadpoles have front legsIII. Listen and match.聽音并連線。第9頁/共14頁IV. Read in group and put the pictures in correct order. Show it.讀課文，把圖片按照正確的順序貼好并展示出來。adult frogseggsbecomehavehavebecomeback legsfroglet第10頁/共14頁第11