1. He lives in a place far-far away.
2. I can only sleep by then.
3. There are still 9 years ahead until I go to college.
4. May you help me to solve/solving/solve/with the problem?
5. It was on April 5th when it snowed.
6. It was April 5th when it snowed.

Are those sentences correct?
Meanwhile, I'm still confused with the emphatic pattern and attributive clause as the following link, thanks a lot!