among,within,across,throughout ,between Do you have any reference sentences for these words? They are similar so I can see how they could be unclear. Here are some examples and you can ask if you need more. Good luck with your studies! Among Among is used to compare things. ex. Among all the sixth graders she is the fastest runner. The berry bush is hidden among the trees. - comparing one thing in a group to the rest. So in the first example we are comparing the fast runner to the other sixth graders. That runner is a part of the group; sixth graders. Among them she is the fastest. Within just means something inside of something else. Usually refers to something that is inside or indoors ex The treasure is hidden within a cave. Across The dictionary examples are good for this one. expressing movement over a place or region. "I ran across the street" expressing position or orientation. "they lived across the street from one another" Throughout also went to the dictionary for this one in every part of (a place or object). "it had consequences throughout Europe" (meaning every place in Europe was effected" from beginning to end of (an event or period of time). "She liked to sing throughout her day" (meaning singing multiple times during the day) between the space or time between two separate items or events. ex. The cat is sitting between Mark and Richard. I will go shopping between breakfast and lunch.

These words are really quite different. Why not consult a dictionary? http://www.thefreedictionary.com/