1.Hi, good morning, you are so early today.

　　嗨，早上好，你今天这么早。

　　2.How come you're so early today?

　　你今天怎么这么早?

　　3.Are you really so early today?

　　你今天真的这么早?

　　4.You are earlier than usual.

　　你比平时要早。

　　5.Traffic was good today, so I made it to the office earlier

　　今天交通状况不错，所以，我可以早点到公司。

　　6.I arrived on time!

　　正点到达。

　　(也可以这样说：I'm on time!)