General Rules:
* Capitalization: Yes, most sentences in English begin with a capital letter. This applies to the first word of a sentence, and often proper nouns like names and places.
* Punctuation: Yes, most sentences end with a period (.).
* Exceptions:
* Interrogative sentences (questions) end with a question mark (?).
* Imperative sentences (commands) can end with a period or an exclamation point (!).
* Exclamatory sentences (expressing strong emotion) end with an exclamation point (!).
* Sentences that are part of a list may not always have a period at the end, particularly if the list is a series of phrases.
Example:
* Declarative sentence: The cat sat on the mat.
* Interrogative sentence: Did the cat sit on the mat?
* Imperative sentence: Sit down!
* Exclamatory sentence: Wow, that cat is fluffy!
* List: I like apples, oranges, and bananas.
So, while the general rule is a good starting point, it's important to remember that there are specific exceptions!