离开房间时把灯关掉。别让它们开着。
Turn off the lights when you leave the room. Don't leave them on.
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don't英 /dəʊnt/|美 /doʊnt/
leave英 /liːv/|美 /liv/
解释
先给出离开时关灯的指令，再用否定祈使句强调不要开着灯离开。
Turn off the lights when you leave the room. Don't leave them on.
先给出离开时关灯的指令，再用否定祈使句强调不要开着灯离开。