One of your employees called to say that she couldn't come to work because her mother died. You want to let the other people in your group know. You write an email about it. The first sentence is like this.
You're talking with a friend about your job. She asks what your career plans are. You tell her that you'd like to stay at your current company and get promoted.
Your husband just raised $1000 for a charity. The charity helps soldiers who were injured while fighting in battles. You're proud of him, so you post this message about him on social media.
“Payment is due within 15 days. If payment is not received by that time, you will be charged a 10% fine.”
You just received a hospital bill. There's a note at the bottom that explains when you must pay the bill by.