1. I have a previous engagement.

2. I was unable to attend because of a previous engagement.

3. I am unable to attend because of a previous engagement.

4. He cannot go for he has a previous engagement.

5. Since you have a previous engagement, why didn 't you say so?

6. Owing to a previous engagement, I shan't be able to come.

7. Mrs Spratt regrets that she is unable to attend owing to a previous engagement.

8. I can't see you on Monday because I have a previous engagement.

1. I have a previous engagement.

2. Mrs Spratt regrets that she is unable to attend owing to a previous engagement.

3. I was unable to attend because of a previous engagement.

4. I can't see you on Monday because I have a previous engagement.