Most of the workers had already rung in by the time I arrived.

我来的时候为止, 大多数工人都已签。

They booked in at the moment they arrived at the office.

们一办公室就签。

When we arrive at the office each morning we have to sign on the dotted line.

我们每天早上达办公室的时候, 得在签簿上签。