Понятно объясните, что такое страдательный залог в языке, как и зачем он используется. примеры.

Глагол-сказуемое употребляется в   страдательном залоге   в том случае, если действие совершается над подлежащим, обозначающим лицо или предмет, каким-либо другим лицом или предметом.

Hi -hello -how are you? -i am fine thanks and you? -me too -i would like to buy new bag -oh okey , can i help you? -yes, ofcourse -let's go to my favourite shop -okey -what bag you would like to buy? -i want big bag for school -what do you think about this? -i don't want to buy white bag. it will become dirty very soon -okay, and what do you think about these one -it is boring i'd like to buy colourful bag -why don't you buy this one -wow! it's the coolest bag i ever seen! i will buy it! how much is it? -it cost 45 dollars and look at this! it is sale! this bag will cost 25 dollars! -great! i am so happy!

passive voice: Omelettes are made with eggs. English and maths are studied in all schools. Everything is tested at the factory. Computers are used in many schools.

conditionals: If you put oil and water in a bottle, they don't mix. If you add a lot of sugar to cold water, it dissolves. If I had a lot of money, i would live in a big house. If people could choose their appearance, they would be pretty. If I study hard, I will pass the exams. If she doesn’t hurry, she will be late. If it hadn’t been so cold, i would wear trainers. If I could spoken english very well, I would speak with people from other countries.