Irregular adverbs are adverbs that do not follow the common “adjective + -ly” pattern. Some have the same form as their adjectives, while others change completely. These forms are common in everyday English and are best learned through clear patterns and examples.
Irregular Adverbs
In English, many adverbs are formed by adding -ly to an adjective. However, some adverbs do not follow this pattern. These are known as irregular adverbs.
Types of Irregular Adverbs
Identical Form (Adjective and Adverb Are the Same)
In this group, the adjective and the adverb have the same form. The meaning is understood from context.
- fast – a fast train / drive fast
- hard – hard work / work hard
- early – an early train / arrive early
- late – a late bus / arrive late
- straight – a straight line / go straight
- high – a high wall / climb high
- low – a low voice / fly low
Examples:
- He is a fast driver.
- He drives fast.
- They arrived late.
Complete Change (Different Adjective and Adverb Forms)
Some adverbs change completely and do not resemble their adjective forms.
- good (adjective) → well (adverb)
Examples:
- She is a good singer.
- She sings well.
Common Irregular Adverbs in Use
- He speaks English well.
- She runs fast.
- They worked hard all day.
- The train arrived late.
- We left early.
Important notes on usage:
Some words ending in -ly are not formed by adding -ly to another adjective. Words such as daily, weekly, and monthly function as both adjectives and adverbs.
- a daily routine / I exercise daily
- a weekly meeting / We meet weekly
In sentences like “He speaks English very well”, the adverb very modifies well.
Common Pitfalls
- hard vs hardly
He works hard. / He hardly works. - late vs lately
She arrived late. / I haven’t seen her lately.
Summary of Irregular Adverb Patterns
- Same form: fast, hard, early, late, straight
- Different form: good → well
- -ly words that are already adverbs: daily, weekly, monthly
Last Updated on January 20, 2026
So helpful
Is cold irregular too? Is it the wind blows cold or the wind blows coldly?
Learn English conversation
yes cold irregular too because cold is a adjective
I have read and understood everything here, it was very clear, THANK YOU