仁愛版初三英語上冊全冊教案5

t: seven.
ss: there are seven other planets that also go around the sun.
t: the solar system, universe.
ss: the solar system is a small part of the universe.
t: launch.
ss: scientists have launched many spaceships to explore other planets in the solar system.
t: beyond.
ss: some spaceships have gone beyond the solar system.
t: discover.
ss: however, no one has discovered any life in space yet.
t: message.
ss: why has no one from other planets sent us a message?
t: information.
ss: have they tried to send information to us?
t: alone.
ss: are we alone, or is there life on other planets in space?
t: good. you did very well. after class you should read the passage again and again until you understand it well.
step 4  practice 第四步  練習(時間:10分鐘)
將情態動詞的被動語態運用于1a中的部分句型，輔以練習，鞏固本單元重點語法及功能句型，完成3a和3b。鼓勵學生大膽表達，學以致用。
1. (通過本話題內容的拓展，復習總結本話題語法。)
t: there are so many planets in space. but no one knows if there is life on other planets. scientists don’t know. we don’t know, either. but do you want to discover the secret?
ss: yes, we do.
t: so what can be done to find out the truth?
s1: more satellites must be sent into space.
s2: more scientific research should be done.
s3: other planets may be visited in the future.
…
(學生會有許多奇思妙想，要允許他們大膽表達，但及時提醒他們用情態動詞+被動語態
的句型結構，然后總結他們的回答或及時記錄其中相關的句子，板書后總結語法。)
more satellites must be sent into space.
more scientific research should be done.
other planets may be visited in the future.
…
modal verb + be + p.p.
2. (出示練習，鞏固含有情態動詞的被動語態，并學習4中的生詞。)
t: now, please change the following sentences into the passive voice. don’t forget the modal verbs, and put them in the right places.
(用幻燈片呈現以下題干，請5名學生在黑板上做改寫練習。其他學生同時在練習本上做。然后再用幻燈片依次呈現答案。師生核對答案。)
(1)we can see many stars in the sky on a fine evening.
→many stars can be seen in the sky on a fine evening.
(2)you may find life on other planets one day.
→life may be found on other planets one day.
(3)you should write the answers on a separate piece of paper.
→the answers should be written on a separate piece of paper.
(4)we should hand in our homework tomorrow.
→our homework should be handed in tomorrow.
(5)the human beings mustn’t throw garbage into space.
→garbage mustn’t be thrown into space.