咔咔,小女侠来啦
1.Troy quantities of more than thirty rare gases,most of them industrial by-product,threaten to warm the Earth's atmosphere even more rapidly over the next 50 years than carbon dioxide (will).
will 不能省略吧,否则有歧义,主语比较或者宾语比较
本句子比较应该是 troy quantities... threaten to warm....even more ...than carbon dioxide will warm.
threaten挺狠的,好象表达了将来的动作,却保持了一般现在时态。创造了比较主体间的时态差异
例如:众多牛牛的存在威胁我下月考G取得高分。 虽然我是下月考试,但是这种威胁是现在就存在的。
当然,carbon dioxide 已经不是威胁了,公认已经产生了。
2.The guiding principals of the tax plan released by the Treasury Department could have even greater significance for the economy than have the particulars of the plan.
在这道题中,前面既有情态动词could又有谓语动词have,这样后面应该是do还是could呢?
我觉得可以do or could,表达不同的意思。但是have不行。
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