Use a superlative to talk about limits: the best and worst, or the highest or lowest of a group. The most or the least.
There are two basic patterns:
| 1) MOST | the most adjective | the most interesting |
| the adjective + est | the fastest | |
| 2) LEAST | the least adjective | the least interesting |
| the adjective + est | the slowest |
Look at the superlative (~est) and the comparative (~er) to help you understand the difference:
A superlative sentence compares one thing with a whole group:
Mount Everest is compared to the whole group it belongs to. The group is 'all mountains in the world'. Mount Everest is higher than all mountains: it is the highest.
A comparative sentence compares one thing with another thing:
Mount Everest is higher than Mount Fuji.
Mount Everest is compared with one other mountain: Mount Fuji. It says nothing about other mountains. It is a comparative sentence.
The superlative is made with ~est or using most before the adjective - these show the highest degree; the most; the first. Knowing whether to use ~est or most can be difficult:
Superlative adjectives (nearly) always use the:
| the most adjective [NOUN] |
the most wonderful story |
| the adjective + est [NOUN] |
the easiest answer |
Often we limit the group we are talking about:
| the most adjective [NOUN] in GROUP | the most exciting player in the NBA. |
| the adjective + est [NOUN] in GROUP |
the fastest runner in her school. |
Use ~est or least before the adjective to show the lowest degree; the least; the last. You should also use the and can limit the group.
| the least adjective [NOUN] + GROUP | the least expensive dish on the menu |
| the adjective + est [NOUN] + GROUP |
the slowest runner in her school. |