Task 3. Put the verbs in the following sentences in the affirmative and negative forms of the Past Simple.

 1.Sometimes she (to take) a bus.

     2. He (to pay) by credit card yesterday.

 

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1. Never walk alone late in the evening or late at night.

2. Never speak first to strangers in the streets.

3. If you see strange people - choose another way.

4. Be calm. Don't be nervous. Don't show you are afraid of the stranger.

5. Never brandish any attractive or expensive things to strangers.

6. Don't shout and don't make noise in the street; don't switch on loud music.    

7. Follow the traffic rules.

   Don't take a lift if the driver is a stranger.

8. Avoid having conflicts with drunk people.

9. You cannot walk large dogs without a muzzle, a leash. - Нельзя выгуливать  больших собак без намордника, поводка.

10. Don't litter and don't spit on the pavement in the street!

    (Don't throw rubbish in the  street!)

11. Tell the parents where and with whom you are going.

12. Cross the road at  “zebra”  crossings!  

(Look left and right before crossing the road)  

13. Cross the road under  green lights!  

14. Don't cross the road under red lights!  

15. Don’t eat any food or drinks!

Страдательный залог - форма залога, показывающая, что лицо или предмет, выступающие в предложении в роли подлежащего, не производят действия (не являются его субъектом), а испытывают на себе чье-либо действие (являются его объектом). То есть, не предмет выполняет действие, а действие совершается над предметом.
Типо как страдательные причастия в русском языке.
Примеры: This postcards was written by him (сравните: He wrote this postcards), Tables are delivered by the firm (сравните: The firm delivers tables)