Student or Learner
I saw the next sentences in Cambridge dictionary.
1. Do you have any experience of working with kids?
2. Do you have any experience working with kids?
I would like to know the meaning of "of(1)".
I wonder why "of" can be omitted.
* I wonder if there is any difference in the meaning among 3 sentences.
3. He has a lot of experience (of) working with kids.
4. He has a lot of experience, working with kids.
5. Working with kids, he has a lot of experience.
In (3) "...of working with kids" is a prepositional phrase that modifies the noun "experience."
In (4)"...,working with kids" is a participle phrase that modifies "He."
In (5)"Working with kids.." is also a participle phrase that modifies "he."