I want to know the different between the phrases the first to do and the first who ever did. Please give some examples.
We both wanted to see that movie, but I was the first to see it. Two weeks later she saw it too.
This means an action done first within a limited group of actions.
John Doe (the director) was the first person who ever watched the completed movie.
This means the first time anyone saw the completed movie.
The comment by ColleenV above makes the same distinction.
"The first to do vs the first who ever did"
Semantically, these phrases seem to be similar, but they significantly convey different senses.
The former phrase is used in an ordinary sense whereas the latter is used in an extraordinary sense. We often hear in our daily life "you were the first to solve this question; he was the first to come to the meeting; I was the first to arrive, etc. etc.
On the other hand, we use the phrase "the first who ever did" when somebody does something exceptional that nobody did before. for example, Muhammad Ali was the the first boxer who ever beat more champions; Nixon was the first American President who ever visited China, etc.