例一 . 写请假条。情景：我生病了，明天不能上学。
1. I’m ill. I can’t go to school tomorrow. (太简单！句子松散)
2. Why can’t I go to school tomorrow? Because I’m ill!(疑问句)
3. I’m ill and I can’t go to school tomorrow.（并列句）
4. I’ll be absent from school tomorrow just because I’m ill.
