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).
Part 1 of 3: Using Possessive Apostrophes. 1. Use an apostrophe to indicate ownership by a proper noun. An apostrophe with an s after a proper noun indicates that the person, place or thing owns whatever noun follows his or her name. For example, Mary's lemons.. We know the lemons belong to Mary because of the ' s.