Выпишите сказуемое и определите время в каждом предложении.
1. Many thousands of years ago there were no houses such as people live in today.
2. Some of their buildings are still standing after several thousands of years.
3. The Ancient Egyptians discovered how to cut stone for building purposes.
4. The Romans were great bridge and road builders.
5. In road work the Romans widely used timber piles.
6. There are still many remains of kilns in some places of Great Britain as well as roads.
7. Concrete is an artificial kind of stone, much cheaper than brick or natural stone and much stronger than they are.
8. The most commonly used (используемые) materials are steel, concrete, stone, wood and brick.
9. Wood is the most ancient structural material.
10. Stone belongs to one of the oldest building materials.
11. Secondary or auxiliary materials are used for the interior parts of the buildings.
12. In comparison with steel timber is lighter, cheaper and easier to work
13. Elimination of this moisture increases the strength, durability and resilience of timber.
14. When an engineer designs a steelwork he must carefully consider all its loads.
15. Concrete is now more widely used in construction than all other materials together.
16. But this method does not utilize the full potentialities of concrete.
21. Concrete is a synthetic stone which can be formed while soft into practically
any shape the builder wants.

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