caffeine

caffeine — noun

1. a substance in coffee, tea, chocolate, and some drinks that can make you feel mo

1.名詞B2
釋義

a substance in coffee, tea, chocolate, and some drinks that can make you feel more awake and active

例句

Priya stops drinking caffeine after dinner so she can sleep well.

verb pattern: drink caffeine

This tea has less caffeine than the strong coffee in our office.

quantity pattern: less caffeine than

同義詞
  • stimulant

    A broader word for any substance that makes you feel more awake; caffeine is one kind.

  • pick-me-up

    Informal and less exact; often means something that gives quick energy, not only the chemical itself.

用法筆記

Often used with amount words such as "less," "too much," and "a lot of." Common verbs include "drink," "avoid," "cut down on," and "contain."

常見錯誤

❌This soda has many caffeine.
✅This soda has a lot of caffeine.
💡'Caffeine' is uncountable, so use 'much' or 'a lot of,' not 'many'.
❌I need a caffeine before class.
✅I need some caffeine before class.
💡Use 'caffeine' for the substance itself, not 'a caffeine' as a countable thing.