Расскажите , правило, когда ставится will, won"t, would и wouldn"t в языке

Will - будущее время. используется для 1,2 и 3 лиц единственного и множественного чисел. 
i will do my homework tomorrow. - я сделаю свое домашнее задание завтра.
после will используется первая форма глагола.

won't - не хочу. обычно используется в настоящем времени. i won't go to school.  - я не хочу идти в школу. тоже первая форма глагола.

Computers have drastically changed everyone’s lives. Several decades ago people haven’t even known anything about these electronic devices, whereas nowadays even a small child can operate this machine. Almost all modern technology depends on computers, which are used for data storage: files, secret information, bank transactions and else. Computer technology belongs to the fastest-growing industry. Computers of different types and sizes are used by modern society. It is interesting that the first computer was the size of a minibus and weighed almost a ton. Whereas now it can be a small chip the size of a pin. And computer technology is not standing still, it’s rapidly progressing. Soon we might have the computers which will be built-in our glasses, earrings, and other objects. Perhaps, the next generation of computers will have the ability to talk and think just as people do. Many people find computers dangerous and time-consuming. On the other hand, computers are very fast and they seldom make mistakes. They save lots of time, and besides all the necessary information can be found on Internet. So, instead of going to the libraries or other institutions, we can simply surf the worldwide web. Another advantage is the instant possibility to send letters, whereas some time ago we had to wait for weeks and months to have them delivered. Moreover, with the help of computers and Internet, shopping has become much easier. Firstly, we can find what we exactly want, secondly we can choose the affordable price, and thirdly, we can have the chose items delivered. After all, computers have become the most useful tool in everyone’s homes nowadays and they have certainly changed our lives for the better.

Iam schoolgirl.my school is near my house.the school is well-equipped,though.it has a lot of classrooms,two computers classes, an assembly hall,library,a gym and canteen.besides,our social and cultural life is well-organized,too.our class visited museums,parks and art gallery.we have different clubs such as chess,drama,dance.what is more,the teachers there are friendly,strict and well-qualified in school.i enjoy studuing in the school,because there are many modern and interesting а ты в каком классе учишься ?