passive verbs的用法和樣例：
例句
- Change these sentences into the Present Perfect Passive, putting the verbs into the correct forms.
用動詞的正確形式將下面的句子變成現在完成時的被動語態。 - Students say out the three forms of some regular and irregular verbs by giving the infinitives.
引入競爭機制，說出規則與不規則動詞的三種形式，鞏固被動語態中過去分詞的正確使用。
