哈哈，上面四个人答案都对。你什么时候将和丽丽吃晚餐（将来时），选前两个。When will you have supper with Lily?
你什么时候和丽丽吃过晚餐（过去式），选后两个。when did you have supper with Lily？
When will you have supper with Lily?
When will you have dinner with lily
when did you have supper with Lily？
When did you have dinner with Lily together?
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