What does it mean "far behind" "far beyond" "question so far" and "far better"
instead of using far better can I use the word "way better or by far" Ex. "I liked the movie by far" This is a right or wrong application of the word far better instead of by far or way better? Can you give an example of each word to understand the whole context of the word.

Question

What does it mean "far behind" "far beyond" "question so far" and "far better" 
instead of using far better can I use the word "way better or by far" Ex. "I liked the movie by far" This is a right or wrong application of the word far better instead of by far or way better? Can you give an example of each word to understand the whole context of the word.

Answer

Far literally means ( to be in a long distance from ), so, when is used in a figurative way, it is used to make a comparison between two things

Ex:     He is far Taller = He is a lot taller ( than someone else of course)
         This book is far Better that those in here = This book is much more better than the others in here

So, i wish this was helpful !     Now i must get FAR away from here!

Answer

我忘了“by far”：She is by far the best executive in the company.

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way：非正式美国英语，“way”相当于“very”，例如：We were way tired after the hike，徒步旅行后我们都很疲惫。

Answer

far behind：远远落后

far beyond：远远超出

so far：迄今为止

far better：远远好于

way better：远远好于（非正式美国英语，“way”相当于“very”，例如：We were way tired after the hike，徒步旅行后我们都很疲惫）