These three words are often used incorrectly too, just like it’s and its, even by native speakers. Again, it’s not very difficult to remember which is correct when.
They’re is the short form of they are:
My parents have gone on holiday and they’re in France today.
When students like a teacher, they’re more likely to do well in the subject he or she teaches.
Their is a possessive word,...
These two words are very often confused. A typical mistake is when somebody uses “its” instead of “it’s”, although the opposite often happens, too. Actually, it’s not very difficult to remember which is correct in a given situation:
you can only use it’s if it is the short form of it is or it has (been). Here are some examples:
When you go abroad, it’s a good idea to...