Exercise
1. Trees are watered (water) in our school every three days.
2. The zo0_ is visited (visit) by lots of children on weekends.
3. A Journey to West is shown_ (show) on CCTV every summer.
4.On Christmas Day, children wake up early and can't wait to open (open) the boxes of presents.
5. We'll have a chance to see (see) the flower show this weekend.

Let's sum up together.
聚焦--般过去时的被动语态
结构:助动词(was/were)+及物动词的过去分词
1.肯定句式:主语+was /were+v.-ed
2.否定句式:主语+was/were + not+v.-ed
3.一般疑问句式: Was /Were+主语+vt.-ed
4.特殊疑问句式:疑问词W/H+was/were+主语+v.-ed
E.g. An e-mail was sent to her friend by Jane yesterday.
An e-mail wasn't sent to her friend by Jane yesterday.
Was an e-mail sent to her friend by Jane yesterday?
Who was the e-mail sent to by Jane yesterday?