停留；逗留
stays — third person singular of stay
先理解核心含义，再看它在真实句子里的用法。
停留；逗留
to remain in a place
We decided to stay at home because it was raining.
因为下雨，我们决定待在家里。
留在特定地点,尤其是短期或确定的时间；逗留；停留
To remain in a particular place, especially for a definite or short period of time; sojourn; abide.
用支索支撑
To brace or support with a stay or stays
继续保持某种特质
To continue to have a particular quality.
借支索使倾斜
To incline forward, aft, or to one side by means of stays.
stay
Base
原形
stays
3rd person
第三人称单数
staying
-ing
现在分词
stayed
Past
过去式
stayed
Past participle
过去分词
I stay calm.
我保持冷静。
She is staying here.
她正待在这里。
They stayed friends.
他们一直是朋友。
规则动词，过去式加-ed。
She stayed in the library until it closed.
她在图书馆里一直待到关门。
How long are you planning to stay in Shanghai?
你打算在上海待多久？