)
1. Students usually arrange the party
2. The teacher gave us a lot of homework
3. Someone often help her with the homework

1. The party is usually arranged by students

The party was usually arranged by students.

The party will be usually arranged by students.

2. A lot of homework is given us by the teacher.

A lot of homework was given us by the teacher.

A lot of homework will be given us by the teacher.

3. She is often helped with her homework.

She was often helped with her homework.

She will be often helped with her homework.