keepyour随课许苏叫voicedown还是keepdownyourvoice都行！！但是只能是说keepitdown。不能说keepdownit。这是动副结构。keepdownsth和k来自eepsthdown都成立的但是当sth是代词层味换轻万时，就只能用keepsth（向代词，例如it）down
keepdown的用法？
jacky
2024-03-27 14:42
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