Question 1

When should I use a hyphen before a noun?

Accepted Answer

Use a hyphen when two or more words work together as one adjective before a noun and the hyphen makes the meaning clearer. Examples include "a well-known author," "a money-back guarantee," "a three-bedroom house," and "an in-depth analysis." The hyphen shows that the words form one description. Without it, the reader may briefly read the words separately. This is especially useful with number compounds, multi-word adjectives, and adjective pairs that could otherwise be ambiguous in writing exercises and tests like these.

Question 2

Why do some compounds lose the hyphen after a verb?

Accepted Answer

After a linking verb such as "be," "seem," or "look," the relationship between the words is often clear without a hyphen. We commonly write "The author is well known" and "The technology is state of the art." Before the noun, the hyphen is more useful: "a well-known author" and "state-of-the-art technology." Some compounds are accepted both ways after the verb, so the exercise may allow more than one answer. Position is the main clue for these questions in this route.

Question 3

What is the rule for -ly adverbs and hyphens?

Accepted Answer

Do not normally put a hyphen after an adverb ending in -ly when it modifies another word. Write "beautifully written poem," "highly rated documentary," "specially designed exam," and "carefully planned event." The -ly ending already tells the reader that the first word is an adverb, so a hyphen is not needed to show the connection. This exception matters because many other compound adjectives before nouns do use hyphens, and learners often over-apply the before-noun rule too widely at first in class.

Hyphenation Rules Exercises

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Compound Adjectives - Easy

Compound Adjectives - Intermediate

Compound Adjectives - Advanced

Compound Nouns - Easy

Compound Nouns - Intermediate

Compound Nouns - Advanced