"of" is usually used when describing something that belongs to something else, or can be used instead of the word about. examples: What is the name of that company? - the name belongs to the company Many of these companies are international. - the sentence is "about"/of the companies. "Of all the bars in all the cities, she had to walk into mine." - famous sentence in America. "Of" here means among because the sentence is talking "about" how there are so many bars. (this last one may be confusing) "to" is used when an action is directed at something, someplace, or someone examples: I am talking to you. / I want to talk to you I am going to the stores. / I need to go to the store. "from" is used to ask or exlpain where something started and how it came to be. -Where did you come from? -I came from China. -Where did you learn english from? -I learned English from my teacher, who is from America. -I received a present -from who? -from someone named Santa

You may adopt one of them to make sentences , then the problem would be emerge and we can give more assistance

"of" - Of is when you are talking about a part of something, for example, " I want a piece of cake." the piece is from the cake. So you want a piece OF the cake, not the whole cake. "to" - a target word/action. For example, "Who are you giving that to?" "from" - Where something originally was. Like, for example... The girl is from Romania. She is now in the usa. She was naturally from romania. Like babies are from women, and grass is from the ground.