by Liz Walter
It often seems that small, common words cause the most mistakes, and I certainly hear my students making errors with words like since, for andago. This post therefore looks at some common errors connected with talking about periods of time and explains how to avoid them.
First, let’s look at the difference between since and for. They are both used to say how long something has been happening, but while since is followed by a precise time or a date, for is followed by a length of time:
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