Grammar · Free lesson
Careful or carefully? Describe the person or the action
Mina checks an address twice before sending a parcel. You can describe her as a careful person, or describe how she checks the address. English uses different forms for those two jobs.
Professor Scott MendozaThe short answer
Use careful to describe a person: “Mina is careful.” Use carefully to explain how someone does an action: “Mina checks the address carefully.” Carefully answers “How does she check it?” It describes the checking, not the address.
Ask what you are describing.
Careful is an adjective. It can describe a noun, as in a careful person, or describe Mina after is: Mina is careful. Carefully is an adverb of manner: it tells us how she checks. In Mina checks the address carefully, keep checks the address together, then add carefully. This is one useful position, not the only possible adverb position.
The person and the way she acts.
Mina is careful.
Mina checks the address carefully.
Carefully describes the way Mina checks. It does not tell us that the address itself is careful.
Explain how she does it
Name the action
Mina checks.
Add what she checks
Mina checks the address.
Describe how
Mina checks the address carefully.
Try it now
What is the word describing?
Read all answers and explanations
Describe Mina as a person: “Mina is ___.”
carefulCareful describes Mina after is. Carefully describes how an action is done; carefulness is the noun for the quality.
Explain how Mina checks: “Mina checks the address ___.”
carefullyCarefully tells us how she checks. It describes the action, so the adjective careful and noun carefulness do not fill this role here.
Choose the standard sentence about running speed.
She runs fast.Fast already works as an adverb. Not every manner adverb needs -ly.
Put it into practice
Keep the checking action.
Say how Mina checks the address. Keep Mina checks the address and repair the last word.
Mina checks the address careful.
See a model answer
Mina checks the address carefully.
The correction adds the adverb form for the action without turning the sentence into a general description of Mina.
A little more clarity
Common questions
A few useful details before you move on.
Can carefully go before checks?
Yes. Mina carefully checks the address is also possible. The ending position practiced here is a useful choice, not a rule that the adverb must always come last.
Mina carefully checks the address.
Why is “Be careful” correct?
Careful describes the person being addressed. Be is not an action that needs a manner description here. “Check carefully” instead describes how to do the checking.
Be careful. Check the address carefully.
Take it into your day
Use careful for the person and carefully for how an action is done. Choose the form from its job in your sentence.
Your next step · Available on Udemy
Choose descriptions that make your meaning clear.
This one contrast helps you connect descriptions to actions. The English Grammar and English Speaking course includes an Adverbs of Manner section with explanation, review, use and practice, as part of its broader grammar and speaking progression.
Explore the course English Master Course: English Grammar and English Speaking