It's generally considered grammatically incorrect to start a sentence with "no" in formal writing. This is because "no" is a negative word, and starting a sentence with a negative can sound abrupt and informal.
However, there are some exceptions and situations where starting a sentence with "no" is acceptable:
* Emphasis: In some cases, starting a sentence with "no" can be used for emphasis. For example: "No, I will not go!"
* Informal writing: In informal writing, like emails or casual conversations, starting a sentence with "no" is more acceptable.
* Literary devices: In literature, writers sometimes break grammatical rules for stylistic effect. Starting a sentence with "no" could be used for dramatic effect or to create a specific tone.
Here are some alternatives to starting a sentence with "no":
* "Not" - "Not everyone agrees with the decision."
* "It is not the case that..." - "It is not the case that the project is finished."
* "I/We/They do not..." - "We do not have the resources to complete the project."
Ultimately, whether or not to start a sentence with "no" depends on the context and the desired tone. In most formal writing, it's best to avoid it.