Possessive Nouns. Possessive nouns are used to indicate ownership. Possessive nouns usually are formed by adding an apostrophe (') and s. When a noun is plural and ends in s, just add an apostrophe ('). If two people own one thing, add the apostrophe and s to the second person only. If two people own separate things, add the apostrophe and s for each person.
Types of antibiotics. There are hundreds of different types of antibiotics, but most of them can be broadly classified into six groups. These are outlined below. Penicillins (such as penicillin and amoxicillin) â widely used to treat a variety of infections, including skin infections, chest infections and urinary tract infections.
Antibiotics differ in the types of bacteria they work against. Antibiotics that affect a wide range of bacteria are called broad spectrum antibiotics (e.g. amoxycillin and gentamicin). Antibiotics that affect only a few types of bacteria are called narrow spectrum antibiotics (e.g. penicillin).ntibiotics are used for a range of other infections caused by bacteria, including urinary tract infections, skin infections and infected wounds.