中文摘要：

“基本（上）”和“都”类副词是可以连用的，以“基本上都”最为常见。这种连用形式刚开始出现时两个副词的表义有分工：“基本（上）”表范围，“都”表程度，后来这种用法虽有沿用，但因为受语义、句法、频率和语用等多种因素的影响，“基本上”和“都”两个副词连用后语义开始中和，逐步演化成一种用来对极限量（极点或邻近这个极点的数量、范围或程度）进行非断言性表述的语言形式。连用形式看似矛盾，实则反映了说话者“求稳、求全”的语言表述心理。

英文摘要：

Based on the analysis of a great number of language data, the present paper points out that Jibenshang（基本上） can collocate with adverb Dou （都） and the like, and Jibenshang Dou（基本上都） is the commonest collocation. In the beginning, these two adverbs in the collocation had different semantic functions： Jibenshang（基本上） denoted scope, and Dou （都） denoted degree. Influenced by factors like meaning, syntax, frequency and language use, they are neutralized semantically, and this collocation gradually evolved into an structure to express extreme quantity vaguely, though their primitive functions in this collocation can still be found today. The collocation seems to be intra-contradictory, but it actually shows an aspect of the speaker＇s psychology of pursuing stability and perfection.