自飘自落
具体情况具体分析1. say 最普通的说，后面加说的内容2. speak 讲 后面加语种，为讲什么语言3. tell 告诉，后面可以接从句，也可以直接加内容4.mention 提到“说”有很多种， 需要看具体的是什么语境。
佼佼猪猪
1、说[shuō] say; speak; talk; theory
(1)用话表达
a. (说) speak; talk; say:
说得多做得少 talk much but do little;
b.（解释） explain:
他说了又说， 我还是不懂。He explained and explained, but I still couldn't understand.
c.（责备; 批评） scold; criticize:
孩子做错了事， 母亲说了他一顿。The mother gave her child a scolding for his wrongdoing.
(2)言论; 主张
theory; teachings; doctrine:
著书立说 write books to expound a theory;
2、说[shuì] try to persuade
（说服别人听从自己的意见） try to persuade:
游说
go around urging rulers to adopt one's political views; peddle an idea; drum up support for a scheme or plan
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