In part 3 of IELTS speaking, you might be asked to compare the past with the present. The examiner will be listening to your use tenses. For example:
Are there any differences between the types of people who were seen as celebrities in the past and those who are celebrities nowadays?
Yes, I think there have been some big changes in the types of people who become famous. In the past, before the invention of television, I suppose there were very few national or international celebrities; maybe kings and queens, military, political and religious leaders were the only household names. With the advent of TV and radio, performers such as actors and musicians became more well-known. However, we now seem to have a completely new breed of celebrity as a result of 'reality' television programmes; these are people who don't really have any special skills as performers, but who are famous for just being themselves.