GRAMMAR GRAMMAR When you mean 'nearly all' use most, not the most• Most pupils wanted to go to university (NOT The most pupils wanted to go to university).Use the most when you are comparing one person or thing with all others• It was the most terrifying experience of my life. In spoken English, you can also use the most when you are talking about just two people or things• Who's the most talented - Will or Gareth? but some users of English think that this use is incorrect and use the more instead• Who is the more talented - Will or Gareth?!! Do not use most with the -est form of an adjective or adverb• one of the hardest things to do (NOT one of the most hardest things to do)
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.