Can we use too in a negative sentence?

You can't use "too" in a negative sentence directly. "Too" implies an excess of something, and negative sentences are about the absence of something.

Here's why:

* "Too" means "more than enough" or "excessively". It implies a positive quantity.

* Negative sentences express the lack of something. They use words like "not", "no", "never", etc.

Example:

* Incorrect: "I don't have too many books." (This sounds strange and confusing).

* Correct: "I don't have many books."

Here's how to express excess in a negative sentence:

* Use "not enough" or "too few" to indicate a lack of something.

* Use "too many" or "too much" in a positive sentence to emphasize the excess.

Example:

* Incorrect: "I don't have too many books."

* Correct: "I don't have enough books."

* Correct: "I have too many books."

In short, "too" is used to indicate an excess, while negative sentences express a lack. It's important to use the correct words to express the desired meaning.