But the most important thing is to learn But the most important thing i...

\u53e5\u5b50but the most important thing is to learn \u4e2d\u7684\u201cto\u201d\u662f\u4ec0\u4e48\u4f5c\u7528

\u4ecb\u8bcd\u7684\u4f5c\u7528

\u4f46\u662f\u6700\u91cd\u8981\u7684\u662f\u53bb\u5b66\u4e60\u4e00\u4e9b\u65b0\u7684\u4e8b\u5e76\u4e14\u4ece\u4e2d\u5f97\u5230\u4e50\u8da3

不是be动词后加to，是be动词后加to do。be动词后面是宾语，要么to do形式要么doing形式。这里是表述“要去学习”新知识，还未发生，用to do，或者可以简单记为短语be to do sth.

短语be to do sth.记住就可以

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扩展阅读：at one point ... the book i like most ... but for the most part ... benefit from ... meanspirited ... at last ... the one i love most ... the city i like most ... the most terrible thing ...