come home, 回家
come back home, 回家

late&early
late, 晚的
early, 早的

come home late, 晚回家
come home early, 早点回家
don't come home late, 不要晚回家=come home early
don't come back home late, 不要晚回家=come back home early

When will you come back home?你什么时间回家？
Please don't come home late！ 不要那么晚回家哦！

I'll = I will (I'll 是I will 的缩写形式，I'll特别用在日常口语中)

I'll be here. 我会在这里。
I'll wait. 我会等。
I'll be back soon. 我很快会回来。
I'll come home soon. 我很快会回家。
I'll see you. 我等会见你。
I'll see you again. 我会再见到你的。

When will I see you again? 我什么时候再见到你呢？
You'll see me soon. 你很快就会见到我了。