Она сама проверила вложение перед отправкой письма.

She checked the attachment herself before sending the letter.

Breakdown of Она сама проверила вложение перед отправкой письма.

• письмо: the letter
• перед: before
• она: she
• проверить: to check
• отправка: the sending
• вложение: the attachment
• сама: myself / by myself

Questions & Answers about Она сама проверила вложение перед отправкой письма.

Why is сама used here, and what nuance does it add?

Сама means herself and adds emphasis: she did it personally (not someone else, not delegated). It often implies something like she double‑checked it on her own / she took care of it herself.
Forms: сам (he himself), сама (she herself), само (itself), сами (they/you plural yourselves).

Could the sentence be just Проверила вложение перед отправкой письма without Она?

Yes. Russian often drops subject pronouns when the subject is clear from context.
Проверила… already shows past, feminine singular, so it strongly points to she. Она is used if you want extra clarity, contrast, or to start a new topic.

Why is проверила feminine, and what does it tell me?

Past tense in Russian agrees with the subject’s gender/number:

• проверил = he checked
• проверила = she checked
• проверило = it checked
• проверили = they checked
  So проверила tells you the subject is feminine singular.

What’s the difference between проверила and проверяла?

This is aspect:

• проверила (perfective) = checked (and finished checking); a completed result is implied.
• проверяла (imperfective) = was checking / used to check / checked (process-focused); it doesn’t emphasize completion.
  In a one-time sequence like “checked before sending,” perfective проверила is very natural.

Why is вложение in this form—what case is it?

Вложение is the direct object of проверила, so it’s in the accusative. For many neuter inanimate nouns, accusative = nominative, so вложение looks unchanged (same form as the dictionary form).

Does вложение specifically mean an email attachment? Could I say something else?

Yes, вложение commonly means an email attachment in this context.
Other common options depending on style:

• вложенный файл = attached file (very explicit)
• прикреплённый файл = attached file (also common)
• прикрепление can be used, but вложение / вложенный файл is often preferred for “attachment.”

Why does перед require отправкой (instrumental)? Why not another case?

When перед means before (time) or in front of (space), it normally governs the instrumental case:

• перед отправкой = before sending
• перед домом = in front of the house
  So отправкой is instrumental singular of отправка.

Why is it перед отправкой письма—why is письма genitive?

Because отправка is a noun meaning the sending (of something), and the “something being sent” is typically put in the genitive:

• отправка письма = sending of a letter/email
• проверка документа = checking of a document
  So письма is genitive singular meaning of the letter/email.

Is письмо “letter” or “email” here?

Письмо can mean both letter and email. With вложение (attachment), it strongly suggests email, but the word itself is still the same.

Is the word order fixed? Could I move parts around?

Russian word order is flexible, and changes mainly affect emphasis:

• Она сама проверила вложение перед отправкой письма. (neutral; emphasis on сама)
• Перед отправкой письма она сама проверила вложение. (sets the time frame first)
• Вложение она сама проверила перед отправкой письма. (focus on вложение)
  The core grammar stays the same, but what feels “highlighted” shifts with placement.