сделайте так 1. a, an,any​

2. I'll do it if I have the time.

2. I would do if I had the time.

2. I would have done it if I had had the time.

3. If I see her, I'll tell her thisstory.

3. If I saw her, I would tell her the story.

3. If I had seen her, I would have told her the story.

4. If it is fine tomorrow, we shall go for a picnic

4. If it were fine tomorrow, we would go for a picnic

4. If it had been fine yesterday, we would have been gone for a picnic.

5. If you work on Sunday, I will pay you well.

5. If you worked on Sunday, I would pay you well.

5. If you had worked on Sunday, I would have paid you well.

6. If I finish the work this week, I will go on vacation.

6. If I finished the work this week, I would go on vacation.

6. If I had finished the work this week, I would have gone on vacation.

7. If it rains next week I shall plant the vegetables.

7. If it rained next week I would plant the vegetables.

7. If it had rained last week, I would have planted the vegetables.

I must be at the train station at 5 o’clock. – Мне нужно быть на вокзале в 5 часов.
I had to be at the train station at 5 o’clock yesterday. – Мне нужно было быть на вокзале в 5 часов вчера.
I will have to be at the train station at 5 o’clock tomorrow. – Мне нужно будет быть на вокзале в 5 часов завтра.
I must go. – Я должен идти.
You mustn’t go. – Ты не должен идти.
Must he go? – Он должен идти?
A doctor must care about his patients. – Врач должен заботиться о своих пациентах.
He must go to work. – Ему нужно ходить на работу.
I must be more attentive to my kids. – Мне необходимо быть более внимательным к своим детям. (человек сам так решил)
I have to send an email to my colleague. – Я должен отправить электронное письмо коллеге.
You must stay here. – Ты должен остаться здесь.
All drivers must have a driving licence. – Все водители обязаны иметь водительские права.
You mustn’t smoke in this room. – В этой комнате нельзя курить.
They mustn’t enter the room. – Им нельзя входить в комнату.