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译林版模块三 Module III Broardening horizons英语《Unit 1 The world of our senses Project(2) Producing a TV show》优秀教学ppt课件
1.That is why pigeons have been used since ancient times.
2. How this compass works remains a mystery.
3. Pigeons appear to have a compass inside them___________ tells them which way is north.
表语从句
主语从句
定语从句
宾语从句
which/that
强调句式：
It is/was + 被强调部分+ that+ 句子其他部分.
The blind man helped Polly on a foggy day.
强调 The blind man
It was the blind man that /who helped Polly on a foggy day.
强调 Polly
It was Polly that/ who the blind man helped on a foggy day.
强调on a foggy day
It was on a foggy day that the blind man helped Polly.
Lucy found a red T-shirt on her desk yesterday.
It was on her desk that Lucy found a red T-shirt yesterday.
It was yesterday that Lucy found a red T-shirt on her desk.
People found pigeons' greatest use in war.
It was in war that people found pigeons' greatest use.
关注动词的形式
1. Pigeons were employed by armies _________ (carry) messages to and from the front lines, __________(save) the lives of many soldiers and even helping some important victories.
to carry