1. The solar lamps are lighting the tunnel. The solar lamps were lighting the tunnel. The solar lamps will be lighting the tunnel. 2. The scientist is developing a new source of energy. The scientist was developing a new source of energy. The scientist will be developing a new source of energy. 3. The engineers are working at the problem of using solar power. The engineers were working at the problem of using solar power. The engineers will be working at the problem of using solar power. 4. The people are not using poor methods of research. The people were not using poor methods of research. The people will not be using poor methods of research. 5. The students are not having an interesting discussion. The students were not having an interesting discussion. The students will not be having an interesting discussion. 6. The sun is not shining brightly. The sun was not shining brightly. The sun will not be shining brightly. 7. The workers are complaining about unsafe working conditions. The workers were complaining about unsafe working conditions. The workers will be complaining about unsafe working conditions. 8. The government is trying to protect consumers. The government was trying to protect consumers. The government will be trying to protect consumers.
2. I wondered if James had always been Lol's devoted friend. 3. I wondered if it had been possible to get seats for the new performance. 4. I wondered if Diana had ever been to the Bolshoi box office. 5. I wondered if the dramatist was writing a new comedy then. 6. I wondered if everyone had noticed the elegance of the scenery on the stage. 7. I wondered why there was so much cruelty in the film. 8. I wondered how long the intervals between the acts were. 9. I wondered if Maria had received my e-mail the day before. 10. I wondered to what theatre they had gone in the first place. 11. I wondered how we could reply to that greeting. 12. I wondered how many people the theatre could hold.
2. The scientist is developing a new source of energy. The scientist was developing a new source of energy. The scientist will be developing a new source of energy.
3. The engineers are working at the problem of using solar power. The engineers were working at the problem of using solar power. The engineers will be working at the problem of using solar power.
4. The people are not using poor methods of research. The people were not using poor methods of research. The people will not be using poor methods of research.
5. The students are not having an interesting discussion. The students were not having an interesting discussion. The students will not be having an interesting discussion.
6. The sun is not shining brightly. The sun was not shining brightly. The sun will not be shining brightly.
7. The workers are complaining about unsafe working conditions. The workers were complaining about unsafe working conditions. The workers will be complaining about unsafe working conditions.
8. The government is trying to protect consumers. The government was trying to protect consumers. The government will be trying to protect consumers.
3. I wondered if it had been possible to get seats for the new performance.
4. I wondered if Diana had ever been to the Bolshoi box office.
5. I wondered if the dramatist was writing a new comedy then.
6. I wondered if everyone had noticed the elegance of the scenery on the stage.
7. I wondered why there was so much cruelty in the film.
8. I wondered how long the intervals between the acts were.
9. I wondered if Maria had received my e-mail the day before.
10. I wondered to what theatre they had gone in the first place.
11. I wondered how we could reply to that greeting.
12. I wondered how many people the theatre could hold.