1. You are so early today.
你今天这么早。
还能这样说：
You come here so early.
You come here in such an early time.
应用解析：
keep early hours 早睡早起；
go to earlier graves than 比……死得早；
early or late 早晚

2. How came you're so early today?
你今天怎么这么早？
还能这样说：
You are earlier than usual.
Why are you so early today?
谚语：
The early man never borrows from the late man.
早起三朝当一工，免得求人家落下封。

3. You are late.
你迟到了。
还能这样说：
You come late!
You don't catch the time.
谚语：
All his geese are swans.
言过其实。

4. Don't forget to clock in and clock out.
上下班都要记得打卡。
还能这样说：
Please remember to clock in and clock out.
Please punch the time clock when you go to work and get off work.
应用解析：
clock指挂钟、座钟等非携带型的钟；
watch指可随身携带的小型计时器。