пример:
O He can't move his arm. Perhaps it's broken.
(might)
It might be broken.
задание:
1 It tastes disgusting. I'm sure it isn't fresh. (can't)
2 He's got a cough and a sore throat. Perhaps he
has a cold. (could)
3 My brother often goes to that café. I'm sure he
knows your sister. (must)
4 It looks bigger than a mouse. Perhaps it's a rat.
(might)​​

1. The first digital computer could__solve__a lot of mathe­matical problems at a fast ___sped___. 2. Vannevar Bush built the first __electronic___computer in 1930. 3. Babbage's analytical engine was designed to ___process___ data. 4. J.von Neumann invented a machine that was able to__process___ not only data but also __texts___. 5. Neumann__came up with___ the idea of storing data in a __memory___ . 6. Computers use two conditions for__numeric___symbols. 7. The invention of___interface___ _devices__made computers possible to control and __generate___electronic signals. 8. Due to__cash___ __memorycomputers could perform__operations much faster. 

P.C.- I was working. – Я работал.

He (she, it) was working. – Он (она) работал.

We (you, they) were working. – Мы (ты, вы, они) работали

Was he working? – Он работал?

Were you working? – Вы работали?

Where was he working? – Где он работал

I was not working. – Я не работал
She wasn’t working. – Она не работала.

Weren’t we working? – Мы не работали?

P.S.- When did you see him? -Когда ты его видел?

Where did you see him? - Где ты его видел?

He always came to school in time - Он всегда приходил в школу вовремя.

She never talked to us - Она никогда не разговаривала с нами.

ВОТ И ВСЕ! ВСЕ ПРОСТО. СТАВЬ ЛАЙК. :) И ОТМЕЧАЙ МОЙ ОТВЕТ КАК ЛУДШИЙ. :)