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.
Yes
The correct spelling of hyphen is nephyh
Since you're changing it into a superlative, you're definitely going to use two separate words, so no hyphen is necessary.
Email is correct. Some people still use e-mail, with a hyphen, but email without a hyphen is used much more often.
Yes. "Hard-working" is a compound adjective, and therefore requires a hyphen between the two words. It is also correct to omit the hyphen and use the single word, "hardworking."
Yes it's correct.
Dry aged steak is correct with or without a hyphen. Dry-aged steak is correct with or without a hyphen.
The word can either be spelt nonexclusive (without a hyphen) or non-exclusive (with a hyphen).
The FirstClass website is used for social networking and collaboration. Blogging, file storage and sharing, private e-mail, calendars, and the mobile cloud are a few services offered by FirstClass.
'Part-time' (with a hyphen) is the correct spelling.
The correct spelling is 'hyphen'.
As a noun they are two separate words. As an adjective you will use the hyphen.
The dictionaries that list it use a hyphen.