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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
look them up
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase 'look them up' is correct and usable in written English.
This phrase is used when asking someone to research something, for example: "I don't know who those actors are - can you please look them up?".
✓ Grammatically correct
News & Media
Academia
Wiki
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
60 human-written examples
I look them up and down.
News & Media
(Yes, we had to look them up, too).
News & Media
Now I'll never know unless I look them up.
News & Media
Gregg offered to look them up and get their permission.
News & Media
A note: don't go and look them up on Wikipedia.
News & Media
When principles are at issue, they simply look them up.
News & Media
I suppose we could look them up, but where's the fun in that?
Academia
Don't worry about memorizing these details, plan to look them up on as-needed basis.
Academia
If you aren't sure on formatting rules, look them up online!
"If you can just look them up and send them to me, we'll be all set".
News & Media
Look them up in PubMed.
Science & Research
Expert writing Tips
Best practice
When using "look them up", specify where to look if it's not obvious. For example, "Look them up online" or "Look them up in the database".
Common error
Avoid using "look them up" when you should use a reflexive pronoun. For instance, instead of saying "They need to look them up to improve", say "They need to look it up to improve", if referring to a singular noun.
Source & Trust
79%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "look them up" functions as a phrasal verb, specifically a transitive one, where "them" is the object. It directs the listener to perform a search to gather information. Ludwig AI confirms its correct usage in various contexts.
Frequent in
News & Media
40%
Wiki
35%
Academia
15%
Less common in
Science
5%
Formal & Business
3%
Reference
2%
Ludwig's WRAP-UP
In summary, "look them up" is a versatile and commonly used phrasal verb that instructs someone to find information about a person or thing, often through online research. Ludwig AI validates its grammatical correctness and prevalent use in various contexts, spanning from news and media to academic writing and informal conversations. Remember to specify where to search for clarity and avoid misusing it with singular nouns, where "look it up" would be more appropriate. Alternatives like "research them" and "investigate them" offer more formal options.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
research them
Focuses specifically on finding information through systematic investigation.
search for them
Emphasizes the act of actively seeking them out.
find information on them
Directly states the action of locating details.
investigate them
Implies a more in-depth and thorough examination.
look into them
Suggests exploring a topic or person more closely.
examine them
Emphasizes a careful and detailed inspection.
check them out
A more casual way to suggest examining or learning about something.
consult information about them
Implies checking a reference source.
gather data on them
Focuses on collecting specific facts or figures.
browse information about them
Suggests casual exploration, rather than a deep dive.
FAQs
How can I use "look them up" in a sentence?
You can use "look them up" when you want someone to find information about something or someone, as in, "If you don't know the answer, "look them up" online".
What is a more formal alternative to "look them up"?
For a more formal tone, consider using "research them", "investigate them", or "consult information about them". These alternatives provide a more professional sound than the casual phrase, "look them up".
Is it correct to say "look it up" instead of "look them up"?
Yes, "look it up" is correct if you are referring to a singular noun. Use "look them up" when referring to plural nouns or a group of people. For example: Look the word up in the dictionary (singular); "Look them up" on social media (plural).
What's the difference between "look them up" and "check them out"?
"Check them out" is a more casual way to suggest examining or learning about someone or something. ""Look them up"" generally means to find information about someone or something, often online. They are interchangeable in some contexts, but not all.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
79%
Authority and reliability
4.5/5
Expert rating
Real-world application tested