Present Perfect настоящее завершённое
have/has +V3(ed)
1. I’m afraid I have left my book at home.
2. …the secretary (yet/come)?
3. I (learn) the rhyme. Could you listen to me?
4. …you (ever/be) to Italy?
5. They (already/inform) me about the accident.
6. He is the most handsome man I (ever/know).
7. Kevin (already/leave) for Manchester.
8. He (not/receive) any letters from her this week.
9. I (not/hear) from him since he left Paris.
10. I (not/see) Tom for ages.
11. …you (have) a holiday this year?
12. We (see) some good films recently.
13. They (wait) for you for half an hour.
14. Mom (have) a headache since she came from the theatre.
15. Alan (work) in the bank for a year.
16. Granny (be) ill for a fortnight.
17. …you (ever/ride) a horse?
18. Sue (not/take) a lot of drugs since she joined the health club.
Put the proper words into sentences:
analytical, digital, unreliable, sophisticated, solve, core, processor, computations, an integral circuit.
1)The Difference Engine could ... equations and led to another calculating machine, the ... Engine, which embodied the key parts of a computer system: an input device, a ..., a control unit, a storage place, and an output device.
2)Ada Lovelace helped to develop instructions for carrying out ... on Babbage machine.
3)J. Atanasoff devised the first... computer to work by electronic means.
4)First-generation computers were ..., the main form of memory being magnetic...
5)In the third generation software became more...
6)What was the name of the first ... computer to work electronically?
7)When electricity passed through the ..., it could be magnetized as either “ofF’ or “on”.
8)A ...is acomplete electronic circuit on asmall chip of silicon.
Ex 1
1. in year four seasons
2. My favorite season is summer
3. It's warm in the summer, you don't need to go to school, you can hang out with friends on the street until late
4. walk outside
5. Stay at home and play computer games
6. weather in Krasnodar in sprink sometimes cold sometimes warm
Ex 2
Present Simple
1. I sometimes plays computer Games
2. I usually walks with me friends
Present Continuous
1. We are cooking now
2. I go to park with my family at the weekend
Present Perfect
1. I have readed a book
2. They drunk water
Ex 3