Almost every week I see mistakes in the use of "affect" and "effect". These are common and important words, especially in the IELTS writing test, so you need to get them right.
"Affect" is a verb. Don't write "affect on".
- Smoking affects your health. (smoking affects on your health)
- The Internet is affecting our way of life.
- Children are affected by what they see on television.
"Effect" is a noun. Do write "have an effect on".
- Smoking has a harmful effect on your health.
- The Internet is having a significant effect on our way of life.
- Television can have a negative effect on children.
If you use these words correctly, the examiner will be impressed.