昨天 我给了Mr.smith一本书(这个的被动要两个)
你不必打印那封信
昨天我们听见他唱了一首英语歌
昨天 我给了Mr.smith一本书(这个的被动要两个)
你不必打印那封信
昨天我们听见他唱了一首英语歌
Yesterday a book was given to Mr.smith by me. Yesterday Mr.smith was given a book by me.
The letter don't be printed by you.
Yesterday he was heard singing an english song by us.