“I” should be used because it’s the correct choice when it comes to subjects. It can also be helpful to consider the position of the word in the sentence. “I” is used before the verb, while “me” is almost always used after the verb (the exception being the predicate nominative).

You have three options for punctuating the end of a sentence: a period, an exclamation mark, or a question mark. Each one sets a different tone for the whole sentence: that of a statement, an outcry, or a question, respectively. An exclamation point is used to show excitement or emphasis. …

End punctuation is punctuation that comes at the end of a sentence of a complete thought. Periods, question marks, and exclamation marks are all examples of end punctuation. Use a period at the end of all declarative sentences and at the end of imperative sentences that do not convey strong emotion.

There are three types of end punctuation: periods, question marks, and exclamation points.

Periods

Top ten punctuation tips

1. Use apostrophes correctly.
2. Know where to place quotation marks.
3. Know how to punctuate with parentheses.
4. Use a hyphen for compound adjectives.
5. Distinguish between the colon and the semicolon.
6. Avoid multiple punctuation at the end of a sentence.

The full stop (Commonwealth English), period (North American English) or full point . is a punctuation mark. In computing, it is called a dot. It is sometimes called a baseline dot to distinguish it from the interpunct (or middle dot).

at the end of a sentence. We shouldn’t use any spaces between the last letter and the full stop. We should use one space between the full stop and the first letter of the next sentence. If we write next sentence, we should write the first letter of the next sentence with capital letter.

Yes or no is normally written with a comma after it, as part of a sentence (as in your example 1). But that’s not essential. If you really wanted to emphasis the positive or negative aspect, you might instead choose to make it stand on its own.

A team of psychologists at Binghamton University in New York conducted a study among the school’s students and found that text message responses to questions that ended with a period were perceived as less sincere than those that did not.

As reported on 21 April: linguist Gretchen McCulloch, who wrote the book Because Internet: Understanding the New Rules of Language, has also issued a warning that ending a sentence with a full stop is rude and aggressive. “If a person uses a full stop all the time, it’s fine,” she said.

In 2015, a study from Binghamton University in New York suggested that people who finish messages with full stops are perceived as insincere. The study involved 126 undergraduates and the researchers found that text messages ending in the most final of punctuation marks – eg ‘lol. ‘, ‘let’s go to Nando’s.

Americans have taken to using full stop not to literally mean a period, but to emphasize that they are referring to a complete sentence, or by extension, a complete idea or phenomenon. …

Fear of periods. Found on http://www.translationdirectory.com/glossaries/glossary141.htm.

Every line should end with a terminal punctuation mark, i.e. a period, question mark, or exclamation mark. If you skip terminal punctuation, it’ll look like you never completed your thought. Right: If you use too many question marks in one email, you’ll sound like you’re interrogating the recipient.

Short responses can be rude if you simply respond with a “Sounds good!” If it merited an answer to a question or some kind of feedback, those two words will be hard for the receiver to digest, with or without the exclamation point.