Look out for sentences that use either the present perfect or past simple tenses. Their different uses are explained below the text. Don’t forget to enter our Xmas competition! 
PRESENT PERFECT vs PAST SIMPLE
Present Perfect Simple
In these sentences, the Present Perfect Simple is used to show past changes in a state which have a result in the present time. We are thinking about the past up to the present moment. There have been some big changes to our idea of Christmas over the last 10 years. Meaning – In 2000 the first German market opened. Between 2000 and 2011 people started to think differently about Christmas. We can see the results of that change now. This long-standing German tradition has become more and more popular in Britain. Meaning – The tradition wasn’t popular in the past. It grew in popularity. It is now much more popular than it was. Form – subject + have/has + past participle + the rest of the sentence e.g. German Christmas Markets have grown in popularity over the last 10 years.
Past Simple
In these sentences, the Past Simple is used to show something started and finished in the past. They first opened in Birmingham ten years ago. Meaning – The first day of the markets (when they “opened”) was in 2000. German companies realised that the Brits quite like the tradition. Meaning – The act of “realising” was a point in time in the past (we don’t know exactly when, but sometime around the year 2000 when the markets first came to England). Form – Subject + regular verb + ed / irregular past simple verb + the rest of the sentence e.g. I visited the Christmas markets last week. / I drank a mulled wine.