1. Was this bag bought on Saturday? 2. Did I buy some flowers yesterday? 3. Is this magazine brought every month?

Past Simple:
1. Объяснение: The question "Was this bag bought on Saturday?" is in the past tense and asks about the time of purchase of the bag. To answer this question, we need to know when "Saturday" occurred. If "Saturday" refers to the previous Saturday, then we can say "Yes, the bag was bought on Saturday." If it is any other day, we would say "No, the bag was not bought on Saturday."

2. Объяснение: The question "Did I buy some flowers yesterday?" is in the past tense and asks about a past action of buying flowers. To answer this question, we should know whether the person speaking bought flowers yesterday. If the person did buy flowers, then we say "Yes, you bought some flowers yesterday." If the person did not buy flowers, the answer is "No, you did not buy any flowers yesterday."

3. Объяснение: The question "Is this magazine brought every month?" is in the present tense and asks about the regularity of bringing the magazine. To answer this question, we need to know if the magazine is brought every month. If it is, we say "Yes, this magazine is brought every month." If it is not brought every month, the answer is "No, this magazine is not brought every month."

4. Объяснение: The question "Is someone always singing in the yard?" is in the present tense and asks about the regular activity of singing in the yard. To answer this, we need to know if there is always someone singing in the yard. If there is, we say "Yes, someone is always singing in the yard." If no one sings in the yard, the answer is "No, no one is always singing in the yard."

Future Simple:
5. Объяснение: The question "Will this house be repaired in summer?" is in the future tense and asks about a future event of house repair. To answer this question, we need to know whether the house is scheduled for repair in the summer. If it is, we say "Yes, this house will be repaired in summer." If it is not scheduled for repair in the summer, the answer is "No, this house will not be repaired in summer."

Past Simple:
6. Объяснение: The question "Did he repair my car very quickly?" is in the past tense and asks about the quickness of repairing the car. To answer this question, we need to know if the person mentioned repaired the car quickly. If he did, we say "Yes, he repaired your car very quickly." If he did not repair it quickly, the answer is "No, he did not repair your car quickly."

Present Simple:
7. Объяснение: The question "Does the postman bring letters every month?" is in the present tense and asks about the regularity of letter delivery by the postman. To answer this question, we need to know if the postman brings letters every month. If he does, we say "Yes, the postman brings letters every month." If he does not bring letters every month, the answer is "No, the postman does not bring letters every month."

Например:
1. В эту субботу была куплена эта сумка?
2. Я купил цветы вчера?
3. Этот журнал приносят каждый месяц?
4. Во дворе всегда поет кто-нибудь?
5. Этот дом будет отремонтирован летом?
6. Он очень быстро отремонтировал мою машину?
7. Почтальон приносит письма каждый месяц?

Совет: To understand and use the Past Simple tense correctly, it is crucial to learn the irregular verb forms and practice using them in different contexts. Additionally, paying attention to the time expressions and understanding their relation to past actions will help in answering such questions accurately.

Задача для проверки:
Напишите утвердительные предложения для каждого предложения выше в соответствующем времени.