Contractions in the IELTS exam
In the IELTS Academic writing module, avoid using contractions. Contractions set a more informal tone to a piece of writing. It is fine to use contractions in the speaking module – in fact, not using contractions when speaking will make your English sound halting and a little forced.
The number of job applications hasn’t increased over the last ten years.
The number of job applications has not increased over the last ten years.