section 2 notes to difficult sentences from unit 5 nelson mandela—a modern hero the time when i first met nelson mandela was a very difficult period of my life.我初次遇到纳尔逊·曼德拉是在我一生的一个非常困难的时期。 when在句子中引导的是时间定语从句。when指时间，在定语从句中做时间状语： (1) i still remember the day when i first came to the school. (2) the time when we got together finally came. 2. …my family could not continue to pay the school fees and the bus fare. 我的家人不能继
