Performance Gap. Background. In recent years, the housebuilding industry and government have grown increasingly concerned over the potential gap between design and as-built energy performance.
The apostrophe (â or ') is a punctuation mark, and sometimes a diacritical mark, in languages that use the Latin alphabet or certain other alphabets.In English, it serves three purposes: 1  The marking of the omission of one or more letters (as in the contraction of do not to don't).he apostrophe (â or ') is a punctuation mark, and sometimes a diacritical mark, in languages that use the Latin alphabet or certain other alphabets. In English, it serves three purposes: 1  The marking of the omission of one or more letters (as in the contraction of do not to don't).
An apostrophe is a punctuation mark used in contractions to replace missing letters. The apostrophe indicates the car belongs to Mary. In addition to being a punctuation mark, apostrophe can also be a literary device in which the speaker of a poem talks to someone who is not there. A famous example of this is Walt Whitman's O Captain!