When it's an adjective, as in first-aid room, first-aid equipment etc.
No, there is no hyphen in "twenty-first century." When used as an adjective, it is written as "twenty-first," but when referring to the era as a noun, it is simply "twenty-first century" without a hyphen between "twenty" and "first."
Yes, "clean out" does not have a hyphen when used as a verb phrase. However, it can have a hyphen when used as an adjective phrase, as in "clean-out sale."
what is a whistle used for in first aid
As with many compound terms, it depends on the usage and placement. In general, if the words are used as a modifier directly preceding the modified word, the hyphen is required. Otherwise the hyphen is not used. Examples: * "We use only first-class ingredients." * "Your presentation was first class." Style manuals such as Words into Type and Chicago Book of Stylehave chapters detailing hyphen usage, and they're excellent references for any writer or student.
As with many compound terms, it depends on the usage and placement. In general, if the words are used as a modifier directly preceding the modified word, the hyphen is required. Otherwise the hyphen is not used. Examples: * "We use only first-class ingredients." * "Your presentation was first class." Style manuals such as Words into Type and Chicago Book of Stylehave chapters detailing hyphen usage, and they're excellent references for any writer or student.
No, decision making does not have a hyphen. It is considered a compound noun that is used without a hyphen.
Yes, use the hyphen to link words that would not flow if read separately. Test by first leaving the sentence incomplete: He used a sharply........??? Then try: He used an angled knife. The latter makes sense so in adding to it, there has to be a 'link' - the hyphen.
The term "first class" is typically written without a hyphen when used as a noun (e.g., "She traveled in first class"). However, when used as an adjective before a noun, it is often hyphenated (e.g., "He purchased a first-class ticket"). Always consider the context to determine the appropriate usage.
No. Fully, when used as an adverb, is not followed by a hyphen. :)
A hyphen is a punctuation mark used to join words and to separate syllables of a single word. Spaces should not be placed between a hyphen and either of the words it connects except when using a suspended or "hanging" hyphen.
on the body
yes