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We are asking anyone who saw anything unusual near Corn Street last night to contact us.
We are now checking the scene for more clues which will help solve the case.
Step2 Presentation
1.Present a picture of a detective and then talk about the picture:
A _________ detective
A detective is someone who looks for clues to something important.
2.教师分析课本第112 页的例句，提醒学生注意限制性定语从句的关系词和先行词的关系。完成练习：判断以下句子是宾语从句(O)还是定语从句(D)
1. The young man mentioned that he was going to visit his parents after work.
2. The elderly couple were very sad to hear that their only son was murdered.
3. The police are now checking the scene for fingerprints and other clues that may help solve the case.
4. There was probably more than one person who had something to do with the murder.
5. A man who had blood on his shirt was seen running down Corn Street.
6. People hope that the police will catch the murderer soon.
Step3. Relative pronouns
以表格的形式教学定语从句的关系代词：
Relative pronoun
People
Things
Who
Which
That
Step4 Practice
Finish off the exercises on SB Page113 B1. Use who, which, that to help them complete their sentences.
教师解释B2部分练习的语境，让学生两人一组讨论完成。核对答案。
A young man who was single was murderer yesterday.
A knife which was covered in blood was found in a rubbish bin near Corn Street.
We need information which will help solve the case.
Here is the drawing of the person who might be the murderer of the young man.
Step5. Discussion
Get the students to discuss the case that happened in Corn Street and try their best to guess who the murderer is