1. The last time Henry smoked a cigarette was in 2005.
→ Henry hasn't smoked a cigarette since 2005.
2. Jack is being stopped by the police because he passed the speed limit.
→ If Jack had passed the speed limit, he wouldn't be (being) stopped by the police.
3. Bill and Peter are too young to ride motocycles. (Enough)
→ Bill and Peter are not old enough to ride motocycles.
4. The flood was so high that they had to live on the roofs.
→ It was such a high flood that they had yo live on the roofs.
5. This winter is colder than the last winter.
→ The last winter isn't so cold as this winter.
6.People all over the country have helped the poor people in the flood region.
→ The poor people in the flood region have been helped by people all over the country
7.It’s cold in the morning, so the children go to school in heavy clothes.
→ Because of the cold weather in the morning , the children go to school in heavy clothes
8. David has read a lot of books but he cannot find a good solution.
→ Although David has read a lot of books, he cannot find a good solution
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