Нужно написать в пассивном залоге 1.someone built the house twenty years ago 2.someone painted the house last month 3.someone stole my wallet yesterday 4.they leave the grapes to dry in the sun 5.someone visits most of the prisoners once a month 6.they make these cars in japan 7.they taught the children to be polite 8.someone found ann's bike in the river 9.someone bought this wine in france 10.someone broke this vase yesterday

The house was built 20 years ago.

The house was painted last month.

My wallet was stolen yesterday.

The grapes are leaved to dry in the sun.

The prisoners are visited once a month.

These cars are made in Japan.

The children are taught to be polite.

Ann's bike was found in the river.

This wine was bought in France.

This vase was broken yesterday.

1.The house was built twenty years ago.
2.The house was painted last month.
3. My wallet was stolen yesterday.
4.The grapes were left to dry in tge sun.
5.Most of the prisoners are visited once a month.
6. These cars are made in Japan.
7. The children were taught to be polite.
8.Ann's bike was found in tge river.
9.This wine was bought in France.
10. This vase was broken yesterday.
Можно еще в конце предложение написать by someone(кем-то)или by them(то есть что-то сделано ими).By someone или by them смотришь по контексту.

Вообще,passive voice нужно понять сразу,чтобы потом не было провалов.

Пассивный залог (passive voice)показывает, что лицо или предмет, выраженное подлежащим, испытывает действие на себе: the house was built (дом построен), (the vase was built - раза разбита)

Для того, чтобы получить форму глагола в пассивном залоге, необходим вс глагол to be в соответствующем времени, лице и числе и причастие времени (Participle II) значимого глагола:

This building WILL BE DEMONSTRATED next month.
Это здание будет снесено в следующем месяце.

My dog HAS BEEN STOLEN.
Мою собаку украли