we are leaving tomorrow and i haven't even started packing yet为什么用动名词,不用动词吗?

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we are leaving tomorrow and i haven't even started packing yet为什么用动名词,不用动词吗?
we are leaving tomorrow and i haven't even started packing yet为什么用动名词,不用动词吗?

we are leaving tomorrow and i haven't even started packing yet为什么用动名词,不用动词吗?
前边are leaving是be动词+动词ing形式表示将来时的一种,这个应该无需解释了.
后边的start packing 是start +动词ing形式的固定用法,表示开始做某事.start 还可以跟不定式to do,请注意区别.