语义上，它们相当于not after，但not放在主动词前-助动词后，语感通常更顺一些。因此，将上面两句的no later than换成not after, 语义勉强说的过去，但语感不好。

剑桥 选举 recession later 于春 2025-09-15 17:05  4

"Had the government, in its attempt to mitigate the economic downturn which was exacerbated by unforeseen global events, not imple

英语 语法 recession 非谓语动词 插入语 2025-06-03 21:09  13

According to Xinhua News Agency, Powell noted that all of the Trump administration's new policies are still evolving, and their ef

dive fed recession mildrecessi 2025-05-13 04:30  18