when（…的时候）请参看以下例句：Today I woke up before 7.（今天我7点钱就起床了）Then I went to school.（然后我去了学校）After school I came back home.（放学后我回家了）When I arrived home I had dinner.（当我回家时我吃了晚饭）Yesterday, I went to work before 8.（昨天8点前我去上班）When I arrived I answered my e-mails.（我到单位后我回了邮件）After I answered my e-mails, I had a meeting.（我回复了邮件之后我参加了一个会议）Then I went out for lunch.（之后我出去吃了中饭）