Question

Write the negative He _ a policman I _ a student She _ a secretary Your brother _ twelve years old Karin and Mark _ brother and sister

Answer 1

Isn't
Am not
Isn't
Isn't
Aren't

Answer 2

Negative statements can be formed by adding the word "not" after the verb "to be" in English. Here are the negative forms of the given sentences:

1. He is not a policeman. 2. I am not a student. 3. She is not a secretary. 4. Your brother is not twelve years old. 5. Karin and Mark are not brother and sister.