Question

She (to help) mother yesterday?​

Answer 1

Я не очень понимаю, утвердительное здесь предложение или нет. В любом случае, время Past Simple.

В утвердительной форме предложение выглядит так:

She helped her mother yesterday

Если же предложение вопросительное, то ставим вспомогательный глагол перед подлежащим и инфинитив глагола:

Did she help her mother yesterday?

Answer 2

The question you've provided is asking for a detailed answer regarding the sentence "She (to help) mother yesterday?" In this sentence, it seems like you're asking about the past action of a female subject helping her mother. To provide a detailed answer, I will assume that the verb "to help" needs to be conjugated correctly in the past tense based on the subject.

Subject-Verb Agreement in the Past Tense

To form the past tense of the verb "to help," we need to conjugate it according to the subject. In this case, the subject is "she," which is the third-person singular form. In the past tense, the verb "to help" is conjugated as "helped" for all subjects.

Answer

Based on the information provided, the correct sentence would be: "She helped her mother yesterday." This means that the female subject assisted her mother in some way on the day prior to today.