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).
But in English thereâs always an exception. For plural nouns that do not end in s, add âs, e.g. womenâs rights. Also, the apostrophe is added for the possessive of a noun that is plural in form but singular in meaning, e.g. mathematicsâ formulas. Lastly, for joint possession, the âs is added to the word nearest the object of possession, e.g. Francis and Kuceraâs book. The apostrophe has a number of other lesser-known uses.