Rewrite the sentences using the causative

To transform the sentences using the causative structure, typically the format is "subject + have/get + object + past participle." Here's how you can rewrite each sentence:

1. Someone is going to check my homework.

   • I am going to have my homework checked.

2. My mum’s phone was repaired a few days ago.

   • My mum had her phone repaired a few days ago.

3. They installed a new alarm in the school yesterday.

   • The school had a new alarm installed yesterday.

4. A friend cut my sister’s hair.

   • My sister had her hair cut by a friend.

5. A new IT centre is being built at the college.

   • The college is having a new IT centre built.

These sentences now reflect the causative form, which indicates that the subject arranged for someone else to perform the action.