You cheated on the final exam. (promise)
Example: I won't ever do it again.
There's no milk in the fridge. (offer)
Example: I'll go and buy some milk at the supermarket.
Your friend, Ian, needs to get to the airport in 2 hours. (decision)
Example: I'll lend him my car to get to the airport.
Someone is at the door knocking loudly. (decision)
Example: I'll open the door.
You are very sick, and you need to rest. (decision)
Example: I won't go to work today.
Your mom's car is in the "no parking" area. (offer)
Example: I'll move it for her.
Your siblings are tired and hungry, and it's noon. (offer)
Example: I'll take you all to McDonald's. Get ready!
Your friend, Lea, needs a ride to the station. (decision)
Example: I'll take her to the station.
You had an important meeting with your thesis advisor. (promise)
Example: I'll pay close attention to the corrections.
Your friend doesn't understand his English homework. (offer)
Example: I'll help him with your English homework.
It's important to be early for the meeting. (promise)
Example: I won't miss the meeting.
Your partner is traveling abroad for a year. (promise)
Example: I'll wait for him/her no matter what.