1. I believe "He speaks English better than I" is more formal. "He speaks English better than me" is probably more commonly used. Both are correct depending on the situation. If you are writing a formal document use "I' and if you are talking with friends use "me."
3. I think the second sentence is incorrect. Since you are describing the verb speak, you need an adverb (which is "well").
I hope that helps!
0 voted
January 23, 2017
0
Corrected
0 voted
December 14, 2016
0
Corrected
Very Hot
It's very hot in the day where I live. To be in a closed place is agonizing. Currently, summer is approaching in my country.
0 voted
December 14, 2016
1
Corrected
I need help
My English is not very good. I need help. I want to learn English because of my work and life, but my oral English is not good.