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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
sometimes difficult to understand
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase 'sometimes difficult to understand' is correct and usable in written English.
You can use it when you want to describe something that is sometimes hard to understand, or when you want to emphasize that something is not always easy to understand. For example: "The instructions for this task are sometimes difficult to understand."
✓ Grammatically correct
News & Media
Science
Academia
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
19 human-written examples
(Group actors were so authentic that it was sometimes difficult to understand what they were saying).
News & Media
It is sometimes difficult to understand, but in the end, the big clubs are big clubs and small clubs remain small.
News & Media
Kimberg's periwigged Count suggests genuine menace and foppish absurdity, though it's sometimes difficult to understand why Nadine Benjamin's Countess remains devoted to him.
News & Media
"Booth had not yet received the brain procedures that would later reverse some of his Parkinson's symptoms and it was sometimes difficult to understand his speech," Ms. Lee wrote in a blog post on Monday.
News & Media
4. By proposing minimal changes, it defines small but obtainable objectives, which will be as much as to increase therapeutic alliance and the tolerance of patients sometimes difficult to understand. 5. Finally, the consultation-liaison psychiatrist must know the language of his/her interlocutors.
Science
Many of the participants in the French revolution thought long and hard about such questions, and while it is sometimes difficult to understand their thoughts, and not always comfortable to do so, it is always interesting to go back into that perennial political laboratory and try.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
41 human-written examples
During her undergraduate research project, she "found [it] sometimes very difficult to understand why people wanted to give up their independence," she says.
Science & Research
"The situation in which we live now provides us with new challenges which sometimes are difficult to understand".
News & Media
A smoker's reluctance to use assistance to quit may sometimes be difficult to understand.
Science
Play has a lot of useful infrastructure in place to support forms, but sometimes it is difficult to understand, or even to find it in the first place.
News & Media
That production made some critics quite cross, and Rice has been honest about the fact that, like many people, she sometimes finds Shakespeare difficult to understand.
News & Media
Expert writing Tips
Best practice
When describing concepts that are generally easy to understand but have occasional complexities, using "sometimes difficult to understand" can provide a balanced and accurate portrayal.
Common error
Avoid using "sometimes difficult to understand" when the subject is almost always incomprehensible. Opt for phrases like "generally incomprehensible" or "consistently challenging to grasp" instead.
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "sometimes difficult to understand" functions as an adjectival phrase, modifying a noun or pronoun by describing a quality or characteristic. As Ludwig AI suggests, it acknowledges potential comprehension challenges without overstating difficulty.
Frequent in
News & Media
40%
Science
35%
Academia
10%
Less common in
Wiki
5%
Formal & Business
5%
Social Media
5%
Ludwig's WRAP-UP
In summary, "sometimes difficult to understand" is a grammatically sound and commonly used phrase for expressing that something presents occasional comprehension challenges. Ludwig AI confirms its correct usage. Found frequently in news, scientific, and academic contexts, this phrase strikes a balance between acknowledging potential confusion and implying general understandability. When writing, it's important to avoid overstating difficulty and to consider more precise alternatives depending on the specific context. Also consider that "often difficult to understand" implies a more recurring problem. Always aim for accuracy and clarity when describing the challenges of understanding.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
occasionally hard to grasp
Replaces "difficult" with "hard" and "understand" with "grasp", focusing on comprehension.
at times challenging to comprehend
Substitutes "difficult" with "challenging" and "understand" with "comprehend", adding a layer of complexity.
now and then tough to decipher
Uses "tough" instead of "difficult" and "decipher" in place of "understand", suggesting a need to decode.
intermittently puzzling to figure out
Employs "puzzling" and "figure out" to convey a sense of confusion and problem-solving.
sporadically obscure to perceive
Replaces "difficult" with "obscure" and "understand" with "perceive", highlighting a lack of clarity.
selectively complex to interpret
Uses "complex" instead of "difficult" and "interpret" in place of "understand", indicating multi-layered meaning.
irregularly abstruse to follow
Substitutes "difficult" with "abstruse" and "understand" with "follow", suggesting an issue with tracking logic.
sometimes intricate to unravel
Employs "intricate" and "unravel" to imply a need to disentangle complexity.
periodically vague to assimilate
Replaces "difficult" with "vague" and "understand" with "assimilate", focusing on incorporation of knowledge.
every so often opaque to discern
Uses "opaque" instead of "difficult" and "discern" in place of "understand", highlighting a lack of transparency.
FAQs
How can I rephrase "sometimes difficult to understand" to sound more formal?
In formal contexts, consider alternatives such as "occasionally challenging to comprehend", "intermittently complex to interpret", or "sporadically obscure to perceive" for a more sophisticated tone. You can read about "occasionally challenging to comprehend" in our examples.
When is it appropriate to use "sometimes difficult to understand" in writing?
Use "sometimes difficult to understand" when referring to concepts, instructions, or situations that are generally understandable but may present occasional challenges or complexities. This phrasing acknowledges the potential for confusion without overstating the overall difficulty. For a related example you can see the explanations of "at times challenging to comprehend".
What are some common synonyms for "difficult to understand"?
Common synonyms include "hard to grasp", "challenging to comprehend", "tough to decipher", and "puzzling to figure out". The best choice depends on the specific nuance you want to convey.
Is "sometimes difficult to understand" the same as "often difficult to understand"?
No. "Sometimes difficult to understand" implies that the difficulty is occasional, while "often difficult to understand" suggests that the difficulty is more frequent. The choice between the two depends on the actual frequency of the difficulty you're describing.
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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
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested