three corresponding to survey administration points plus half-year and 1-year points
这是“独立主格结构”。其构成为:逻辑主语(three)+ 现在分词短语(corresponding to survey administration points plus half-year and 1-year points)。corresponding to 也可以理解为,是由现在分词变来的分词介词,意为“与...相应/一致”。
plus half-year and 1-year points,plus 是介词,意为“加上;包括”,这是介词短语,作定语修饰前面的points。
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Internet use measures were divided into five time periods, three corresponding to survey administration points plus half-year and 1-year points.
(1)plus half-year and 1-year points为介词短语作后置定语修饰名。词“points"
(3)three+corresponding 为数词+现在分词构成独立主格结构作状语。
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