Помогите переделать предложения из активного залога в пассивный залог. Заранее спасибо!

1. The course will be finished by the students in July.
2. Shoes were made by them in that factory.
3. dinner was cooked by them when I arrived.
4. that skyscraper was built by them in 1934.
5. the new product design has been finished by them.
6. bicycles mustn't be left by people in the driveway.
7. the preparations had been finished by them by the time the guests arrived.
8. the streets are being repaired by them this month.

А самой-то слабо что-ли... Формула страдательного (ТАК он по-русски называется) залога проста - to be + VIII...знай себе изменяй вспомогательный глагол!; -)
1. The students will finish the course in July. - The course will be finished by the students in July.
2. They make shoes in that factory. - Shoes are made in that factory.
3. They were cooking dinner when I arrived. - Dinner was being cooked (by them) when I arrived.
4. They built that skyscraper in 1934. - That skyscraper was built in...
5. They have finished the new product design. - The new product design has been finished (by them).
6. People must not leave bicycles in the driveway. - Bicycles mustn't been left in the driveway (by people).
7. They had finished the preparations by the time the guests arrived. - The preparations had been finished (by them) by the time the guests arrived.
8. They are repairing the streets this month. - The streets are being repaired this month.

пишите мне, могу помочь))