Find mistakes in the sentences and correct them. model: this girl my sister. - this girl is my sister. queen elizabeth ii are the head of the royal family. - queen elizabeth ii is the head of the royal family. 1. this my daughter. 2. these is my children. 3. kate my niece. 4. their family very large. 5. their twins 5 years old. 6. i 18 years old. 7. those families very happy. 8. they am william’s brothers. 9. harry sam’s cousin. 10. sally and beth is sisters