English Reference

since vs for

Since marks the specific starting point of an action, while for measures the total duration of the period.

since

marks the beginning of a period

The company has occupied this office space since the summer of 2015.

for

measures the length of time

They lived in the suburbs for ten years before moving to the city.

Watch out

  • We have known each other for last Christmas.

    We have known each other since last Christmas.

  • I have been working here since three months.

    I have been working here for three months.

Remember Since = Start. For = Full length.

Quick check

Fill the gap with one of the two options.

  1. 1.

    I have not seen any improvement in his performance the last meeting.

  2. 2.

    She has been waiting in the lobby over forty-five minutes.

More like this in Everyday pairs.