HELP! Перепишите следующие предложения, подчеркните в них глагол-сказуемое, определите его время, вид и залог. Переведите предложения на русский язык.
1. Despite the apparent properties of compound semiconductors, their general use has not been great because of several limitations. 2. The potential difference across the junction had been increased. 3. Magnetic amplifiers have been employed for some 50 years; transistors were reported upon in 1948. 4. Sometimes a decision to compute is followed by a process of selecting the particular kind of computing machine, which best suits for the given problem. 5. Our rockets, the first in the world, were being sent to other planets. 6. This problem must be approached from another point of view. 7. This job cannot be done for a short period, you need at least a month. 8. It is 20 years since he left home, and he has never been heard of since. 9. Tell him he is being waited for. 10. L. Carroll is remembered not as a mathematician but as the author of Alice in Wonderland.

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Объяснение:

1. Despite the apparent properties of compound semiconductors, their general use *has not been* great because of several limitations. -

Несмотря на очевидные характеристики составных полупроводников, их общие использование не распространено из-за некоторых ограничений.

*has not been* - Pr. Perfect Active

2. The potential difference across the junction *had been increased".

Увеличена разность потенциалов на переходе.

*had been increased* - Past Perfect

Passive

3. Magnetic amplifiers *have been employed* for some 50 years; transistors *were reported* upon in 1948.

Магнитные усилители используются уже около 50 лет; о транзисторах было сообщено в 1948 ГОДУ.

*have been employed* - Pr. Perfect

*were reported* - Past Simple Passive

4. Sometimes a decision to compute *is followed by a process of selecting the particular kind of computing machine, which best *suits* for the given problem.

Иногда за решением о вычислении следует процесс выбора конкретного типа вычислительной машины, КОТОРЫЙ лучше всего подходит для Данной задачи.

*is followed* - Pr. Simple Passive

*suits* - Pr. Simple Active

5. Our rockets, the first in the world, *were being sent* to other planets.

Наши ракеты, первые в мире, отправлялись на другие планеты.

*were being sent* - Past Continuous Passive

6. This problem *must be approached*

from another point of view.

К этой проблеме нужно подойти с другой точки зрения.

*must be approached* - Present Simple

Passive

7. This job *cannot be done* for a short

period, you *need* at least a month.

Эту работу нельзя делать за короткий срок, нужен минимум месяц.

*cannot be done* - Present Simple Passive

*need* - Pr. Simple Active

8. It *is* 20 years since he *left* home, and he:* has never been heard* of since.

20 лет с тех пор, как он ушел из дома, и с тех пор о нем никто не слышал.

*is* - Pr. Simple Active

*left* - Past Simple Active

*has been heard* - Present Perfect

Passive

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