Where are you (going) later?I've got some shopping to do.为什么用going?如题.

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Where are you (going) later?I've got some shopping to do.为什么用going?
如题.

Where are you (going) later? I've got some shopping to do中later为将来时时间状语;to do不定式表将来
一般现在时表将来,用be doing

later是过一会儿,表明是将来时态。
将来时态可以用will,也可以用be doing的形式。

因为前面有be动词。
be动词后的动词必须用ing(即现在分词)形式。