1,My children will turn off the lights when going to bed.-> The lights will be turned off by my children when going to bed
2,They will use solar energy to protect the environment.-> Solar energy will be used to protect the environment
3,We often walk to school.-> We often go to school on foot
4,We will use less electricity in the future.->Less electricity will be used less in the future
5,Athough he is old he can run fast.->Inspite of his old age, he can run fast
6,People will use biogas for fuel in home and for trensport.->Biogas will be used for fuel in home and for trensport
7,The film bored them so they left early.->The film was so boring that they left early