perfect participle

Rewrite the sentence, using perfect participle

After the students had learnt about the benefits of recycling and reusing, they started collecting waste paper, bottles, and cans to recycle and reuse.

= ________recycling and reusing, the students started collecting waste paper, bottles and cans to recycle and reuse.

Rewrite the sentence, using perfect participle

Since Mai had refused Nam's offer of a lift in his car, she had to walk home.

= _________ a lift in his car, Mai had to walk home.

Rewrite the sentence, using perfect participle

After Ha had read some documents about Green Earth, she decided to join the organisation.

= _______ Green Earth, Ha decided to join the organisation.

Rewrite the sentence, using perfect participle

Since the farmers used too much chemical fertiliser on their farm, they now have to drink polluted water.

= _________ their farm, the farmers now have to drink polluted water.

Rewrite the sentence, using perfect participle

After she replaced all the light bulbs in her house with LED lights, she saved a lot of money on her electricity bills.

= __________ the house with LED lights, she saved a lot of money on her electricity bills.

Rewrite the sentence, using perfect participle

Since we have become too dependent on the use of electricity, we have to find alternative sources of energy before fossil fuels run out.

= ________ the use of electricity, we have to find alternative sources of energy before fossil fuel runs out.

Rewrite the sentence, using perfect participle

After I watched the documentary about wildlife, I made a donation to an environmental society.

= ________ wildlife, I made a donation to an environmental society.

Rewrite the sentence, using perfect participle

After I ate my evening meal, I decided to go for a walk

= ______ meal, I decided to go for a walk.

Rewrite the sentence, using perfect participle

Because I had spent the whole day cleaning up my room, I needed to take a shower and have a rest.

= ________ cleaning up my room, I needed to take a shower and have a rest.

Rewrite the sentence, using perfect participle

Since the authorities had managed water resources irresponsibly, they had to deal with water shortages in the region.

= ___________ irresponsibly, the authorities had to deal with water shortages in the region.