学习目标 了解主动语态和被动语态,主动语态表示主语是动作的执行者, 被动语态表示主语是动作的承受者；被动语态的构成“助动词be+及物动词的过去分词”。
学习重点 一般现在时的被动语态
重点句型When was it invented? It was invented in 1885.
When were electric slippers invented? They were invented last year.
Who were they invented by? They were invented by Julie Thompson.
What are they used for? They’re used for seeing in the dark
