Student or Learner
I heared that the current English users omit prepositons when it relates with place/time/manner
He has no place to live (in).
She walked (for) ten miles.
We talked (for) an hour.
I want to do it (in) my way.
also, they do not when it is formal or not place/time/manner
I have no one to turn to.
This room doesn't seem to have been slept in.
I wonder why this is happened and want to see more examples about this!