明天你有空吗？不是将来时态的句子吗？为什么都用are you free tomorrow而不用will you be free tomorrow?

因为“明天有没有空” 是一个 客观事实 只要是客观事实的东东 一般都用一般现在时 例如“太阳从东边升起 西边落下”不管前一句是什么时态 这句话都用一般现在时 单三

Good to see you again. Are you free tomorrow?
很高兴再次见到你。你明天有空吗？
A I’m afraid I have to go. I’ve got to get an early night.
A 恐怕我得走了。我今晚得早点休息。
B No problem. Anyway, it’s good to see you again. Are you free tomorrow?
B 没问题。无论怎样都很高兴再次见到你。明天你有空吗？
A Tomorrow? I might be. What time?
A 明天？可能有空。什么时候？
B How about early evening just after work? We could meet for dinner.
B 明天傍晚下班之后怎么样？我们见面后一起吃晚饭。
A Around six o’clock? I think I could do that.
A 六点左右？我想可以。
B Or lunchtime if that’s easier for you. I’m free both times.
B 或者是午餐时间如果你更合适的话。我两个时间都有空。
A Early evening is best. Shall we say six – at your hotel?
A 傍晚最好。咱们6点在你的旅馆见面好吗？

Notes 注释
1 Remember a way of suggesting an arrangement: Are you free tomorrow? / are you free tomorrow; Are you free next weekend? / Are you free next weekend?
记住建议某个安排的说法：Are you free tomorrow? /明天你有空吗？； Are you free next weekend? /你下周末有空吗？
2 You can describe approximate meeting times in various ways, e.g.: . . . just after work / . . . just after work; . . . early evening / . . . early evening; around six o’clock / around six o’clock.
你可以用多种方法描述见面的大致时间。例如：. . . just after work /就在下班之后：. . . early evening / . . .傍晚的时候：around six o’clock /大约6点。

Key phrases and sentences
I’m afraid I have to go.
I’ve got to get an early night.No problem.
Anyway, it’s good to see youagain.
Are you free tomorrow?
Tomorrow? I might be. What time?
How about early evening just after work?
We could meet for dinner.
Around six o’clock?
I think I could do that.
Or lunchtime if that’s easier for you.
I’m free both times.
Early evening is best.
Shall we say six – at your hotel?
恐怕我得走了。
我今晚得早点休息。
没问题。无论怎样都很高兴再次见到你。
明天你有空吗？
明天？可能有空。什么时候？
明天傍晚下班之后怎么样？
我们见面后一起吃晚饭。
六点左右？我想可以。
或者是午餐时间如果你更合适的话。
我两个时间都有空。傍晚最好。
咱们6点在你的旅馆见面好吗？

都对 现在进行时表将来时

固定表达，老师这样说的，表客观实际