学习目标
1.重点词汇：不规则动词的过去式
2.重点句型：1. I had a busy weekend. 2. We had a school trip last month.
特殊疑问句：特殊疑问词+ 一般疑问句（顺序）？
---What did Li Lei do last weekend? - --He visited his grandparents.
——李雷上个周末干什么了？ ——他看望了他的祖父母。
---Where were you yesterday? ---I was at ho me.
——你昨天在哪儿？ ——我在家里。
