被动语态用法a letter posted today will probably reach him the day

被动语态用法a letter posted today will probably reach him the day He posted the letter two hours ago.改为被动语态 I posted the letter （改为被动语态） Have they posted the letter yet?改为被动语态如题 He writes a letter every day.（改为被动语态） The boss often makes him work for 12 hours a day.转换为被动语态 Have they posted the letter yet改被动 Have they posted the letter yet?改为被动语 He has posted the letters already.改为被动语态 Have you posted the letters yet?变被动语态 Have you posted the letters yet?改成被动语态 Did he write a letter to him?(改为被动语态）