仁愛版初三英語上冊全冊教案4

t: find out.
girls: using the stars, they could find out where they were and in which direction they were going.
t: as long as.
boys: this method worked well at night as long as the weather was good and the stars could be seen.
t: problem.
girls: but it didn’t work so well during the rest of the time. that was a problem.
t: like.
boys: gps is like a man-made star.
t: use.
girls: we can use it at any time, in any place and in any weather to find out our position.
t: shape.
boys: gps can also be used to study the shape of the earth.
t: ok, you did very well. boys and girls are all excellent.
3. (歸納總結，回應呈現部分，完成1c。)
t: now, we have known gps very well. i think you have found out the answer to the question. s1, could you tell me why the police could catch the thief easily?
s1:  because of gps.
t:  that’s right. when the thief was using the cellphone, the police could use the information gps offered to find out the position of the cellphone. so we can say it was gps that helped the police catch the thief. s2, what do you think gps will be used for in the future?
s2:  it can be used to study the shape of the earth.
t:   what do you think of it, s3?
s3:  we can use it at any time, in any place and in any weather to find out our position.
t:  ok, in short, it is very useful to us.
step 4  practice 第四步  練習(時間:13分鐘)
讓學生自主歸納本話題的語言項目，然后聽2a和2b錄音，完成2a和2b。復習一般過去時被動語態的用法和本話題的功能意念句，培養學生自主學習能力。
1. (讓學生整理本話題的語言點、重點句型并放入自己的“百寶箱”。培養學生自主學習和歸納總結的能力。)
(語言點及重點句型。)
be made of / from
be developed / invented in / by
be used for
i hope your dream will come true.
i wish i could go into space some day.
it is said that …
dna is the same in every part of your body.
be similar to
no one knows for certain.
they will no longer want to be our servants, but our masters.
as long as
in short, this robot is very useful to us.
(學生做完后，教師進行抽查并指導。)
2. (讓學生聽2a和2b的錄音，并跟讀。然后完成下面的練習。)
t: listen to 2a, 2b and read after them. then finish the following exercises.
(將下面的句子由主動語態變為被動語態，或者將被動語態轉化為主動語態。)
(1) i learned a lot of information about spaceships from mr lee.
(2) i was allowed to play computer games yesterday.
(3) the digital camera was invented in 1975.
(4) guglielmo marconi invented the radio in 1895.