In this lesson, we look at how to use the tricky prepositions for, since and ago. For is used for a period of time that something goes on. I’ve been working for hours. I’ll do the job for a year. I ...

An authority on the English language has set us free from the tethers of what many have long regarded as a grammatical no-no. Or has it? The answer depends on how you side with a declaration from ...