Если слова автора стоят в Present Simple (Indefinite), Present Perfect или Future Simple, то в косвенной речи время не меняется.
Если слова автора стоят в Past Simple, Past Continuous или Past Perfect, то в косвенной речи время меняется в зависимости от того, какое время было в прямой.
The secretary has said that the press conference is taking place now in the main hall.
My brother has said that Aunt Sally will come on Monday.
The students have said that they had two tests last week.
Her daughter said that she wasn't listening to music then.
My friend said that he had visited all those places.
Tom said that he was a first year student then.
She said that she hadn't been speaking to him since the day before.
Susan said that she had been in the library two days before.
The boy said that he hadn't been watching TV at home at 8 o’clock.
The teacher said that they had been writing since early morning.
He said that he would visit me the following Friday.
She said that she would be leaving her home at 10 o’clock that night.
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Объяснение:
1) Organs and organ systems of any living organism are constantly functioning.
2) This group of researchers recently made an interesting scientific discovery.
3) A new medication burns fat fast.
4) Living cells are able to generate movement.
5) You can observe the direction of movement of particles with the help of a new generation of devices.
6) You can measure the strength of muscle contractions with this device.
7) Movement is one of the main properties of life.
8) You must follow the direction of movement of the experimental animal.
9) Scientific research includes a hypothesis, experiment and conclusions.
10) Each muscle cell contains a protein molecule.
Ted decided to buy an expensive computer. So Brian had to go out and buy a more expensive computer. And Mike got the most expensive! But why?
They work in the same office. Brian works harder than Mike.
Ted gets on good with the boss. But Mike is the the better
Although they are all clever, Mike is the luckiest
And as a result he is the happier
Надеюсь правильно