there (will be) serious air pollution if people use more and more cars.为什么用will be?

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there (will be) serious air pollution if people use more and more cars.为什么用will be?
there (will be) serious air pollution if people use more and more cars.为什么用will be?

there (will be) serious air pollution if people use more and more cars.为什么用will be?
条件状语从句,主将从现,从句if people use,用了一般现在时,主句必须用一般将来时,表示将来会有严重的空气污染
另外 there be结构是表示存在有的句式,即哪里有,be可以有时态的变化,一般将来时,be变为将来时的will be

if 引导的条件状语从句 “主将从现”，即主句用将来时，从句用一般现在时
望采纳O(∩_∩)O

if条件句

表示将来，所以用将来时。
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there be 的一般将来时态，根据后边的if 条件状语从句判断。
满意请采纳，谢谢！

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