Quiero saber si estas oraciones están correctas1?

Quiero saber si estas oraciones están correctas 1. Be careful! That tree will fall. 2. Bye! I am going to be back! 3. I'm all dressed up in my new football kit because I am going to play today. 4. I am going to see you sometime this evening. 5. I am going to have dinner with you because I booked a table for two. 6. The President will arrive at 6 : 00pm. 7. I am going to be late tomorrow. 8. Jane will have a baby in the summer. 9. Bye for now. Perhaps I will see you later. 10. It's hot in here, I think I will turn on the a / c.