If I have time tomorrow,tomorrow不是用于将来时吗?为什么这里的have用的是一般现在时呢

If I have time tomorrow,tomorrow不是用于将来时吗?为什么这里的have用的是一般现在时呢 have to 可以表将来时的吗?例：I have to go to school tomorrow. Does he have time tomorrow?Is he free tomorrow?为什么不用将来时 I have time tomorrow 的同义句 Call me tomorrow if you have time.的意思? If I _should_have_ (have) time tomorrow,I would _come_(come) what would you do if it rains tomorrow?主将从现.那这里的would 也是将来时吗 i_ the CDs to you if i have time tomorrow I hope you can come to my house tomorrow.can不是不能用于将来时中吗?这个句子 Call me tomorrow if you have time. 用if合并句子：I'll come to see you.I have time tomorrow. I'll come to see you .i have time tomorrow.用 if合并两个句子