1. It is going to rain. (Look at those dark clouds is a sign that it will rain soon)
2. I hope the concert will be good tonight. (Expressing hope for a future event)
3. I'm sure she will fall. (The ladder doesn't look safe, so it is likely that she will fall)
4. I'm sure he won't mind. (Suggesting that Jack is willing to lend his camera)
5. I will fail my exam. (Expressing a prediction based on not doing any revision)
6. I will come with you. (Expressing a decision to go into town with someone)