What are some accomplishments that Muhammad Ali did?​

1. He was one of the greatest boxers

2.  The first fighter to win the world heavyweight championship on three separate occasions

3. He was known for his social message of black pride and black resistance to white domination and for refusing induction into the U.S. Army during the Vietnam War.

the present continuous is a verb tense which is mainly used to indicates that an action is in progress at the moment of speaking.  

it is formed using: person + verb to be (am/is/are) +verb + - ing form  

example: i am studying at this moment .

in addition, the present continuous is also used in order to express things that will or will not happen in the near future.

example: i am having dinner with some friends tonight.

the speaker sometimes   uses it   to express that an action is repeated and it causes irritation on the part of the speaker

example: my sister is constantly complaining about everything.