What words do you think are the most frequently used in the English language? How many of them do you know?
This website is a list of the most frequently used English words, based on the 450 million word COCA corpus (Corpus of Contemporary American English). The site is searchable in many ways, and iIt may help you decide which words are really important to make part of your active vocabulary list.
What do you think is the first verb on the list? The first noun?
Does the list surprise you?