Prepositions 俚语大观
轻松掌握英语中介词构成的地道俚语表达
英语中的介词（prepositions）不仅用于表示位置或方向，还常出现在各种生动有趣的俚语中。
这些表达让你的英语更自然、更地道！下面是一些常见又实用的 prepositions 俚语示例。
On the ball
机灵；反应快；做事高效
例句：She’s really on the ball when it comes to solving problems.
Under the weather
身体不适；有点生病
例句：I’m feeling a bit under the weather today—might skip the meeting.
Over the moon
欣喜若狂；非常高兴
例句：He was over the moon when he got the job offer.
In hot water
陷入麻烦；惹上麻烦
例句：Tom is in hot water for missing the deadline again.
By the book
严格按照规则办事
例句：The manager does everything by the book—no exceptions.
Out of the blue
出乎意料地；突然地
例句：She called me out of the blue after ten years!