Youyouyoumatch the words to the picto the pictures. then listen and check.you1ecampfire2 firewoodropefishing rod51first-aid kitblanketcamp stovecool boxwhistle10penknife​

She teaches English in our school
She doesn't teach English in our school
Does she teach English in our school
She is teaching us to swim now
Is she teaching us to swim?
She isn't teaching us to swim
She will teach him to speak Spanish next year
Will she teach him Spanish?
She won't teach him Spanish
He has breakfast at 8 o'clock every morning
Does he have breakfast at 8?
He doesn't have breakfast at 8
He is having breakfast now
Is he having breakfast?
He isn't having breakfast
He will have breakfast at 9 o'clock tomorrow
Will he have breakfast?
He won't have breakfast
They do homework every day
Do they do homework?
They don't do homework
They are doing homework now
Are they doing homework?
They aren't doing homework
They will do homework in the evening
Will they do homework in the evening?
They won't do homework in the evening

В этом предложении "was invented" является страдательным залогом(но его еще называют "пассивным залогом",это одно и то же).
У ЛЮБОГО предложения с страдательным залогом в нем есть одна общая форма. Это глагол to be+ глагол в 3 колонке(или добавляем окончание ed,как это тут,если глагол "правильный")
Был изобретен электрический телеграф-перевод предложения. В страдательном залоге ВСЕГДА действие происходит над подлежащим(над предметом).
Ну,так и все. Если еще останутся вопросы,но спроси потом в комментариях.