GRAMMAR – Prepositions of Time


We use FROM … TO to show when something begins and ends.
– The class will be from 2 pm to 4 pm.
– She was sick from Tuesday to Friday.
– The course runs from January to May.

We use AGO to say how much time before now that something happened.
– I started studying English three months ago.
– I moved to Brazil 17 years ago.
– The last election was almost three years ago.

We use BEFORE to refer to a period of time preceding a particular event, date, or time.
– I usually wake up before 6:30 on weekedays.
– I had read the book before I saw the movie.
– The game is on before the News.

We use BY to say that something will happen no later than a time or date.
– Students must hand in their homework by Friday.
– I will be back by six o’clock..
– The rain should stop by the weekend.

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