Очень срочно написать 16 предложений во всех временах Passive:
- to improve brain abilities (должно получится 8 предложений)
- to train brains (должно получится 8 предложений)

1. Brain abilities are improved. - Present simple.
2. Brain abilities are being improved. - Present continuous.
3. Brain abilities have been improved.  - Present perfect.
4. Brain abilities were improved. - Past simple.
5. Brain abilities were being improved. - Past continuous.
6. Brain abilities had been improved. - Past perfect.
7. Brain abilities will be improved. - Future simple.
8. Brain abilities will have been improved. - Future perfect.

1. Brains are trained. - Present simple.
2. Brains are being trained. - Present continuous.
3. Brains have been trained. - Present perfect.
4. Brains were trained. - Past simple.
5. Brains were being trained.- Past continuous.
6. Brains had been trained. - Past perfect.
7. Brains will be trained. - Future simple.
8. Brains will have been trained. - Future perfect.