Three letter rule poets such as John Milton alternated between short and long forms for function words, depending on whether they occurred on or off the meter. For instance: While many function words have more than two letters ("and", "she", "were", "therefore", etc.), the exceptions to the rule are rather two-letter content words. Only a few of these occur commonly in most texts: the words "go" (which also has a functional usage in the idiom "going to do something"), "ox" and, especially in American texts, "ax". English grammar is relatively flexible about converting words of one class to another, allowing verbal uses such
Word spacing look overspaced. The perfect word space is affected by the circumstance; “at larger sizes, when letterfit is tightened, the spacing of words can be tightened as well.” Two other gentlemen have expressed different opinions on what the space between words should be. Aaron Burns, a typographer, suggested that the lowercase “r” was the best size for spaces between words. Edward Johnston, a noted calligrapher, supported that the lowercase “o” was the more appropriate size of measurement for spacing. Word spacing Word spacing in typography refers to the size of the space between words. It should be distinguished from letter-spacing (the