a flock of birds a pack of dogs a herd of cows/horses/antelope a flock of sheep a pack of cards a pack of cigarettes a case of beer a piece of cake (or anything else that breaks into pieces) a slice of cake/cheese/meat... or anything else you can cut) a sliver of cake (sliver is a very small piece) a bowl of soup a set of dishes a new set of,,, (almost anything ideas, things, people) a new set of discoveries a new set of tires a new set of politicians

Careful here. "shoes" and "pair of shoes" are not completely interchangeable. If you are wearing shoes, then you must be wearing two shoes (no one I know of has three feet, and someone with only one foot would wear "a shoe" not "shoes"). However, if they are not being worn, then "shoes" means two or more shoes, not necessarily "a pair of shoes." This means the word "wearing" is actually what makes "a pair of" adjunct when talking about shoes. Pants always come in "a pair of pants" so those are interchangeable. As for "bread" and "piece of bread", this is a matter of being specific or not. It is the same as saying "I have two dogs," or just saying "I have dogs." This is not adjunct. Overall, most objects can be described with extra, unnecessary wording. However, that's not quite the same as being specific.

i'm also not so good at english, but i know another two words a cop of coffee/tea a piece of paper