1. According to 'spacing words', write the following right.

Iaminmyfirstyear. -> I am in my first year.

2. Let's write down the self-introductory passage on the memo on the left.

3. Correct the following self-introductory passage for Tom right.

4.The first letter in a sentence, the first letter in a person's name, and the proper name of a thing should be capitalized.

4-2. We should use a capital letter for
the first letter in a sentence, the first letter in a person's name, and the proper name of a thing.

(Are the expressions above grammatical?)

1. According to 'spacing words', write the following right. I would use "correctly" rather than "right," but what you wrote is not incorrect.

Iaminmyfirstyear. -> I am in my first year. correct

2. Let's write down the self-introductory passage on the memo on the left.

3. Correct the following self-introductory passage for Tom right.
"Self-introductory" means that someone is telling or writing his own introduction; others cannot do it for him. I think you mean simply "introductory," not "self-introductory."

4.The first letter in a sentence, the first letter in a person's name, and the proper name of a thing should be capitalized.
correct

4-2. We should use a capital letter for the first letter in a sentence, the first letter in a person's name, and the proper name of a thing.
correct

1. To correctly write "Iaminmyfirstyear" as "I am in my first year," you need to add spaces between the words. Each word should be separated by a space to ensure proper readability.

2. To write the self-introductory passage on the memo on the left, follow these steps:
- Take a memo or a piece of paper and place it on the left side.
- Start writing your self-introductory passage with an appropriate greeting, such as "Hello" or "Hi."
- Introduce yourself by stating your name, background, or any relevant information you want to share.
- Include details about your interests, hobbies, or any achievements you would like to highlight.
- Depending on the purpose of the memo, you may also want to mention your goals, objectives, or what you hope to achieve.
- Remember to keep the passage concise and clear, using proper grammar and punctuation.

3. To correct the self-introductory passage for Tom, please provide the original passage, and I can help you with the necessary corrections.

4. The expressions "the first letter in a sentence, the first letter in a person's name, and the proper name of a thing should be capitalized" and "We should use a capital letter for the first letter in a sentence, the first letter in a person's name, and the proper name of a thing" are both grammatically correct. They both convey the same information but are phrased slightly differently.