我认为它们在你父母的房间里用英文怎么说
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"They" 指的是什么?请提供更多上下文。如果您是想问在父母房间里说英语的正确用法,那么可以说 "They are speaking Engpsh in their parents' room." 或 "They are using Engpsh in their parents' room.". "They" 是第三人称代词,指示第三人,"are speaking" 是现在进行时的动词,表示正在进行的动作,"Engpsh" 是名词,指英语这种语言,"in their parents' room" 是介词短语,表示在父母的房间里进行这个动作。