2 这里为何使用进行时态
看一篇讲述牛奶营养方面文章有一句话：
In fact, in 1985，the United States Department of Agriculture officially recommended a switch to skim milk, three glasses of it a day. But, more recently, we've begun collecting evidence that says the USDA might be missing an important piece of story.
请教大家，这句话中进行时态be missing里的动词miss完全是一个过去的动作，语义也不需要强调正在进行，为何使用进行时态呢？
并请与一些其他例句来说明这样的表达方法?
最佳答案 2022-01-17 08:04
《韦氏高阶》动词miss释义之一及例句如下，你的句子中miss就是这种用法。
3 [+ object] : to be without (something) : to lack (something) — used in the phrase be missing
He was missing one of his front teeth. [=he did not have one of his front teeth; one of his front teeth was missing]
The old house is missing some of its windows.
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