学英语的先入为主可以用 "having a prior assumption" 来表达。这个短语的意思是，在学习或做出决策之前，人们可能已经做出了先入之见，也就是说，他们对事物或情况有一个先验的假设或看法。
例如：
Many people have a prior assumption that learning a foreign language is difficult, so they may not be motivated to try.
When I first saw the problem, I had a prior assumption that it would be easy to solve, but it turned out to be much more comppcated than I thought.
例如：
Many people have a prior assumption that learning a foreign language is difficult, so they may not be motivated to try.
When I first saw the problem, I had a prior assumption that it would be easy to solve, but it turned out to be much more comppcated than I thought.