I need some example and help in how to use particles.
Here is a handy reference: https://www.tofugu.com/japanese/japanese-particles-cheatsheet/
本があります。means there is a book. The が in the middle is the particle. There are a few more particles such as に and を and は. the particle を can be used in a sentence like,"おちゃをのみます。" the を in this case is used after おちや because を is used to indicate the direct object. the other particles would take a while to explain so I just used を as an example. It takes a little while to learn but when you get used to it, its pretty easy. I think Duolingo does an okay job of particles but if you really want to learn your particles/Japanese grammar you might want to get a book called, "All About Particles" by Naoko Chino, and like the title of the book says, it covers all the particles and how to use them correctly in a sentence. another idea is to take Japanese language courses on sites other than Duolingo. Maybe take a college course on Japanese. But no matter which way you choose to learn it is going to require lots and lots of practice, just like every other language. I hope you understand the concept soon, and I hope I was helpful. さいようなら！
Just to clarify, the を particle comes AFTER the direct object, not before the verb. English uses prepositions (like "at" or "to" or "on") which are placed in front of the related word. For example, "to school" or "at the supermarket" or "on my bed".
Japanese particles are POSTpositions. They are positioned after the related word. For example, 学校へ (to school), スーパーで (at the supermarket), ベッドの上に (on the bed).
Just keep in mind that Japanese particles do not match up perfectly to the English prepositions. There is some overlap, but many particles have their own unique roles in Japanese which do not line up perfectly with the way these concepts are mapped in other languages. And sometimes there is no direct comparison in English.
For example, the particle は is frequently used to mark "topics" in Japanese. It is one of the first particles that you will encounter when learning Japanese, but it is also one of the trickier particles to fully grasp, since there isn't a good English equivalent. Another example is the particle に which is one of the most versitile particles. It is used in many different ways and is one of the most important particles to fully understand complex grammar - it is used to specify endpoints in time AND space, both literally and figuratively. Because it can be used in so many ways, it gets translated to English in multiple ways ... depending on how it is used it might mean "on", "at", "to", and "in", among other possibilities.
Good luck and do your best!