IELTS Vocabulary: paraphrasing techniques

Here are some techniques that should help you to paraphrase (to say the same thing in different ways):

1) Use a synonym

This is important = This is significant / crucial / vital

2) Use an opposite

I found it difficult = It wasn't easy for me

3) Change active to passive

You should not do this = This should not be done

4) Use a related word (e.g. change the verb into a noun)

The number rose = There was a rise in the number

5) Consider a more formal or informal version

I am worried = I am extremely concerned (formal) / I'm stressed out (informal)

Task:
Try using some of these techniques, and let me know if you think of any others.