您应该能够对此进行修改,以获取自己想要的方式。
Sub ChangeSentenceColors()
Dim sentence As Range
Dim randColor As Long
For Each sentence In ActiveDocument.Sentences
randColor = RGB(Int((255 - 0 + 1) * Rnd + 0), _
Int((255 - 0 + 1) * Rnd + 0), _
Int((255 - 0 + 1) * Rnd + 0))
sentence.Font.Color = randColor
Next
End Sub