Period Four　Grammar-Review of adverbial clauses

感知以下课文原句，完成方框下的小题

1．When he retired at the age of 26，he had won 106 gold medals in major competitions across the world.

2．But even though he had won everything it was possible to win in his sport，Li Ning retired with the feeling that he had failed.

3．If you go into a school or university anywhere，the chances are you will see students in Li Ning tracksuits with the familiar logo.

4．Whenever Chinese athletes step out onto the track during the 2008 Olympics，they will be wearing Li Ning tracksuits.

5．The marathon is the final Olympic event because it is thought to be the hardest.

1．以上句中，句1、4是时间状语从句。

2．句2是让步状语从句。

3．句3是条件状语从句。

4．句5是原因状语从句。

　　状语从句也称为副词性从句，修饰主句中的动词、形容词或副词等。状语从句放在主句之前时，常用逗号分开；放在主句之后，一般不用逗号。状语从句按其意义和作用，可分为时间状语从句、地点状语从句、条件状语从句、原因状语从句、结果状语从句、目的状语从句、让步状语从句、方式状语从句、比较状语从句等。本模块复习时间状语从句、条件状语从句和让步状语从句。

一、时间状语从句

　　常用来引导时间状语从句的词有：when，whenever，as，while，before，after，since，until/till，as soon as，immediately，the moment等。

1．when，while和as引导的时间状语从句

(1)when"当......时"，引导时间状语从句，表示主句的动作和从句的动作同时发生或先后发生；从句中的动词可以用延续性动词，也可以用终止性动词。

It was snowing when we got to the airport.