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1.She said the ball ( is / was ) round 2.She said ball (is /

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1.She said the ball ( is / was ) round 2.She said ball (is / was ) round .哪个对,为什么?
1.She said the ball was round.她说那个球是圆的.
这个句子中the ball was round是普通宾语从句,所以时态要与主句保持一致.用过去式.
2.She said ball is round .她说,球是圆的.
这个句子的从句中主语是ball而不是the ball,即不是特指某样东西而是泛指球这一类事物,是抽象的统称,所以 ball is round 就上升为了客观真理,客观真理句的时态永远是一般现在时.故用is.