本影片所學文法為被動句-Passive voice，透過家人給Tom的生日驚喜為情境帶入課程，說明如何由一般的主詞＋動詞＋受詞的句型，如Someone opened the door.轉換為被動句的句型架構：接受動作者＋(be ＋ p.p.)＋做動作者，例如The door was opened by someone.。以及解說使用被動句敘述的原因為不知道或是不強調動作者，所以經常省略後方做動作者，因此被動句的架構會變為句型一：主詞＋(be V＋ p.p.)＋by someone(不重要常省略)，例如English is spoken around the world.／The dogs are fed three times a day.／The door wasn't opened by Tom.。句型二為助動詞的被動句，架構為主詞(接受動作者)＋auxiliary(助動詞)＋be V＋ p.p.，例如The report will be finished by Friday.／The show can be watched on YouTube.／The door shouldn't be opened right now.第三種句型為完成式的被動句，架構為主詞(接受動作者)＋have／has＋been＋p.p.(完成式＋被動)，例如The snack has been sold for 50 years.／The buildings have been built since 2010.。