grammar

Relative clauses – A cap is a garment. We wear this on our head.

Clauses of result – The doctor used such a cold gel.

Relative clauses - X-rays are a form of electromagnetic radiation. We use them to create images of the inside of the body.

Clauses of result – The image was so clear.

Relative clauses – A mammogram is a machine used to take pictures of the breast. It helps to detect cancer.

Clauses of result – The injury is so painful.