Too 和 enough 都用来描述程度或数量，但方向相反。Too 表示「超过合适、想要或可承受的程度」——通常意味着出现了问题或障碍。Enough 的意思是「足够」——恰好所需的量或更多。在否定句中，not enough 表示「不够、达不到所需的量或程度」，这同样会造成问题。
- The coffee is too hot.（我没法喝——这是个问题。）
- The coffee is cool enough to drink.（没问题——温度刚刚好，可以喝。）
掌握这两个词会让你的英语听起来自然得多。
简单规则： Too 放在形容词和副词前面；enough 放在形容词和副词后面，但放在名词前面。
Too：超过所需或超出可接受范围
将 too 直接放在形容词或副词前面：
| 结构 | 例句 |
|---|---|
| too + 形容词 | The box is too heavy to lift. |
| too + 形容词 | It's too cold to go out. |
| too + 副词 | She speaks too fast for me. |
| too + 副词 | You arrived too late. |
Too 始终带有负面含义——表示某种问题或障碍。可以这样对比：very 是中性的程度副词，而 too 表示「过了头」，通常说明存在问题。比较：✅ She's very tall（中性描述）与 ✅ She's too tall（暗示问题，例如她进不了门）。两者不可互换：❌ She's very tall to reach the shelf 结构不对——应用 ✅ She's tall enough to reach the shelf（如果她够得到）或 ✅ She's too short to reach the shelf（如果够不到）。
中文常说「够高/足够高」，把「够/足够」放在形容词前；英语刚好相反，要说 ✅ tall enough，不能说 ❌ enough tall。
Too much 和 too many
当问题涉及名词而非形容词或副词时，用 too much（不可数名词）或 too many（可数名词）。关于 much/many 作为数量词的完整介绍，请参阅 Some, any, much, many, a lot of。
| 结构 | 例句 |
|---|---|
| too much + 不可数名词 | There's too much traffic today. |
| too much + 不可数名词 | I ate too much sugar. |
| too many + 可数名词 | There are too many people here. |
| too many + 可数名词 | He made too many mistakes. |
当名词从上下文中已经清楚时，too much 和 too many 也可以单独使用：
- "Do you want more coffee?" — "No thanks, I've already had too much."
- "Did you make any errors?" — "Yes, too many."
Enough：恰好的量（或更多）
Enough 的位置取决于它后面跟的是什么。
形容词和副词之后
当 enough 修饰形容词或副词时，放在形容词或副词后面：
| 结构 | 例句 |
|---|---|
| 形容词 + enough | Is the soup warm enough? |
| 形容词 + enough | She's old enough to drive. |
| 副词 + enough | He didn't run fast enough. |
| 副词 + enough | You spoke clearly enough — I understood everything. |
一个非常常见的错误是把 enough 放在形容词前面：✅ tall enough——绝不能 ❌ enough tall。
名词之前
当 enough 修饰名词时，放在名词前面：
| 结构 | 例句 |
|---|---|
| enough + 名词 | Is there enough time? |
| enough + 名词 | We have enough food for everyone. |
| enough + 名词 | I didn't have enough money. |
Enough + 名词适用于不可数名词和复数可数名词：enough time、enough chairs。单数可数名词的形式——❌ enough chair——不使用。
动词之后
Enough 也可以直接跟在动词后面，表示「足够的量」：
- Did you eat enough?
- He didn't study enough to pass the exam.
- I don't sleep enough.
Too / enough + 不定式
这两个词经常引出 to + 动词原形短语，说明结果或（不）可能的动作。这种用法有时叫作结果不定式，与你在 Infinitive of purpose (to + verb) 中看到的目的不定式不同。
Too + 形容词 + to + 动词原形（程度过高，导致动作无法发生）：
- The water is too hot to drink.
- I was too tired to go out.
- He's too young to drive.
形容词 + enough + to + 动词原形（条件足够，所以动作可以发生）：
- She's tall enough to reach the top shelf.
- Is it warm enough to sit outside?
- I don't feel confident enough to speak in public.
这个句型可以用 for + 人来扩展，说明情况对谁有影响：
- The film is too scary for young children to watch.
- The exercise is easy enough for beginners to do.
- It's too expensive for me to buy right now.
常见错误
- ❌ She is enough old to drive. → ✅ She is old enough to drive.（enough 放在形容词后面）
- ❌ It's enough warm outside. → ✅ It's warm enough outside.
- ❌ The bag is very heavy to carry. → ✅ The bag is too heavy to carry.（very 本身不表示「过度」——这里要用 too）
- ❌ I have too much many bags. → ✅ I have too many bags.（用 too many，不用 too much many）
- ❌ He speaks too fast for understand him. → ✅ He speaks too fast for me to understand him.（指出谁受影响时用 for + 人 + to + 动词原形）
- ❌ There isn't enough of time. → ✅ There isn't enough time.（enough 和名词之间不加 of）
快速检测
每个空格填哪个词或短语？（too、too much、too many 还是 enough）
- The music is ____ loud. I can't hear you.
- Is there ____ coffee for everyone?
- She's ____ experienced to make that mistake.
- There are ____ cars in this city — the traffic is awful.
- He didn't study ____ to pass the exam.
显示答案
- too 2. enough 3. too 4. too many 5. enough
要点总结
- Too = 超过所需，通常表示有问题。放在形容词和副词前面。
- Too much（不可数）和 too many（可数）放在名词前面。
- Enough = 足够。放在形容词和副词后面，但放在名词前面。
- 两个词经常引出 to + 动词短语：too hot to drink、warm enough to swim in。
- Very 和 too 不可互换：very 是中性强调词；too 标记问题。