被動語態與主動語態的轉換

用主動語態寫的句子會比被動語態的句子還要容易理解。將被動語態轉為主動語態很簡單，但需要練習才能徹底掌握。在以下的對應表中，請注意被動句的 Be 動詞時態一律和主動句的主要動詞時態相同。為了要用主動語態，您必須明確表示做動作的主詞為何。

主動語態和被動語態，以 to keep 為例

時態	主動語態	被動語態	主動句	對應的被動句
現在簡單式	keep	is kept	I keep the butter in the fridge.	The butter is kept in the fridge.
現在進行式	is keeping	is being kept	John is keeping my house tidy.	My house is being kept tidy.
過去簡單式	kept	was kept	Mary kept her schedule meticulously.	Mary's schedule was kept meticulously.
過去進行式	was keeping	was being kept	The theater was keeping a seat for you.	A seat was being kept for you.
現在完成式	have kept	have been kept	I have kept all your old letters.	All your old letters have been kept.
過去完成式	had kept	had been kept	He had kept up his training regimen for a month.	His training regimen had been kept up for a month.
未來簡單式	will keep	will be kept	Mark will keep the ficus.	The ficus will be kept.
現在條件式	would keep	would be kept	If you told me, I would keep your secret.	If you told me, your secret would be kept.
過去條件式	would have kept	would have been kept	I would have kept your bicycle here if you had left it with me.	Your bicycle would have been kept here if you had left it with me.
現在不定式	to keep	to be kept	She wants to keep the book.	The book wants to be kept.
完成不定式	to have kept	to have been kept	Judy was happy to have kept the puppy.	The puppy was happy to have been kept.
現在分詞和動名詞	keeping	being kept	I have a feeling that you may be keeping a secret.	I have a feeling that a secret may be being kept.
完成式分詞	having kept	having been kept	Having kept the bird in a cage for so long, Jade wasn't sure it could survive in the wild.	The bird, having been kept in a cage for so long, might not survive in the wild.