Unit 5 Discovering Useful Structures 课件-2023-2024学年高中英语人教版（2019）必修第一册

人教版（2019）必修一 Unit 5 Languages Around the World Discovering Useful Structures Describe your favourite things Learning objectives By the end of this section, you will be able to: identify and summarise the function of relative adverbs in restrictive relative clauses; describe one of your favourite memories with restrictive relative clauses. Review the grammar you learnt in the last unit. modify a noun or pronoun can be introduced by relative pronouns There were deep cracks that appeared in the well walls. The number of people who were killed or badly injured in the quake was more than 400,000. The supplies which were provided to the disaster area were collected from around the country. L e a d - i n restrictive relative clauses provide specific information that, which, who, whom, whose Presentation Look at these sentences and underline the restrictive relative clauses. What kind of information does each clause communicate? It was a time when people were divided geographically. Information: a time for an event Emperor Qinshihuang united the seven major states into one unified country where the Chinese writing system began to develop in one direction. Information: a location for an event There are many reasons why people learn a foreign language. Information: a reason for an action These were animal bones and shells on which symbols were carved by ancient Chinese people. Information: a location for an action 限制性定语从句 关系副词引导的定语从句 1. when引导定语从句的用法 (1) 当先行词是表示时间的名词（如time，day，year，month，week等），且关 系词在从句中作时间状语时，定语从句用 when 引导。 (2) when可以换成“介词+which”。 The first of October, 1949, is the day when (=on which) the People’s Republic of China was founded. 1949年10月1日是中华人民共和国成立的日子。 I’ll never forget the time when (=during which) we visited Xi’an. 我永远不会忘记我们参观西安的那段时间。 Do you remember the day when (=on which) we first met? 你还记得我们第一次见面的那一天吗？ 注意 当先行词是表示时间的名词时 ， 既可以用when引导定语从句，也可以用that或 which引导定语从句，关键要看关系词在定语从句中作何种成分。若关系词在 定语从句中充当状语 ， 则用 when引导 ； 若关系词