Adapted from https://www.altopedia.net/activities/3-how-long-have-you-bingo
First introduce the grammar with the powerpoint provided, then drill using the wordwall quiz at the link below;
https://wordwall.net/resource/42426673/for-since-or-ago
there's lots of ways you can use it, I like to get each row to stand up one at a time and when the question is answered correctly give points to that column of tables for extra competition.
Once you've done that, introduce the grammar for the question from the presentation and draw the bingo on the board.
From that point on, it should be fairly self-explanitory.
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