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1. Greet the students with each other.
2. Review all the tenses that have learnt.（口述）
3.Review the past tense and past participle of verbs
Step 2:语态概述
英语的语态是通过动词形式的变化表现出来的。英语中有两种语态：主动语态和被动语态。
主动语态表示主语是动作的执行者。
例如：We speak English.
谓语：speak的动作是由主语we来执行的。
被动语态表示主语是动作的承受 者，即行为动 作的对象。例如：English is spoken by many us.主语English是动词speak的承受者。
Step 3: 主变被解题步骤
找宾语 ----即动作的承受者
判断宾语的单复数 ----即be动词的单复数.
判断动词的时态 ----即be动词的时态.
修改谓语的时态 ----即原句动词改为过去分词
修改原句的主语 ----即by+ 主语/ 宾语.
They make shoes in that factory.
Shoes are/were made by them.
Step 4:主变被口诀
被动语态强调“宾”，用be加上动“过分”。
“be”要随着主语变，人称时态要弄准。
“行为对象”作主语，逻辑主语“by”来引。
Step 5:被动语态结构归纳
She waters the flowers every day.
The flowers are watered by her every day.
一般现在时(simple present)：
S(主语)+am/is/are +过去分词(done)
例1.They do their homework after school.
---Their homework is done (by them) after school
例2.He plays basketball every week.
----Basketball is played (by him) every week.