These different dictionarys don't agree about what part-of-speech "all" is when it goes between subject and verb:
For Cambridge dictionary is an adverb
- The kids all go to school on the same bus. link
For Macmillan dictionary is a pronoun
- These buildings all belong to the college. link
For Merrian-Webster dictionary is an adjective
- They all came late.
- We all need to work faster. link
I am a little confused about them. Can some of you explain them? Thanks for your answers