"stay awake"是英语常用短语，音标为/steɪ əˈweɪk/，表示“保持清醒”，即维持不睡觉或不昏昏欲睡的状态。它由动词"stay"（保持）和形容词"awake"（醒着的）构成，强调主动维持清醒状态，而非自然醒来。
语法结构：作为动词短语，可直接接在情态动词、实义动词后作谓语，如"need to stay awake"或"find it hard to stay awake"。
适用场景：常用于描述对抗疲劳、睡意的情境，如熬夜工作、长途驾驶、课堂学习等场景。
As the afternoon wore away, I found it more and more difficult to stay awake.
下午慢慢过去，我发觉越来越难以保持清醒。
I'm so tired I can hardly stay awake.
我疲倦得简直昏昏欲睡。
Fans in Europe are contemplating another key battle: How to stay awake.
欧洲的球迷们正在思考另一个关键问题：如何保持清醒观看比赛。
Many students could hardly stay awake in his class without first drinking a cup of coffee.
如果不先喝杯咖啡，许多学生在他的课上几乎无法保持清醒。
Keep the radio playing, roll the window down, or play a road trip game to stay awake if you find yourself tired.
如果你觉得累了，打开收音机、摇下车窗或玩公路游戏来保持清醒。
If you aren't sleepy and find yourself unable to fall asleep quickly, get up and stay awake for a while.
如果你不瞌睡却无法快速入睡，就起来保持清醒一会儿。
Then, at 2 p.m., the nap group was given the chance for a 90-minute siesta; the no-nap group was asked to stay awake.
然后在下午2点，午睡组有90分钟午休机会，无午睡组被要求保持清醒。
It was a real effort to stay awake through the film.
强打精神才能看完整部电影。
Some patients come in using so many psychiatric meds they can barely stay awake.
有些患者服用了太多精神药物，几乎无法保持清醒。
That might be simply a function of being able to stay awake to finish homework.
这可能只是能够保持清醒完成作业的一种能力。
常见搭配：
stay awake all night：整夜不睡，如"stay awake the whole night"（一夜没合眼）；
barely stay awake：几乎无法保持清醒，强调极度疲劳状态；
try to stay awake：努力保持清醒，如"Try to stay awake during the lecture"；
difficult/hard to stay awake：难以保持清醒，描述对抗睡意的过程。
从熬夜赶工到课堂学习，"stay awake"始终是描述人类对抗生理极限的常用表达。下次当你需要强打精神完成任务时，不妨试试这个短语——毕竟，连古人都懂"惟将终夜长开眼"的坚守呢。