Used and loved by millions
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
observed and continue to
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "observed and continue to" is not correct as it stands; it should be "have observed and continue to" for proper grammatical structure.
You can use it when discussing ongoing actions or behaviors that started in the past and are still relevant. Example: "I have observed and continue to notice improvements in the team's performance over the last few months."
⚠ May contain grammatical issues
Wiki
News & Media
Science
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
1 human-written examples
Minor landslides have been frequently observed, and continue to occur.
Wiki
Human-verified similar examples from authoritative sources
Similar Expressions
59 human-written examples
Until the system changes, we will continue to see this kind of behavior just like we did with slavery, just like we did with ordination for women and LGBT folk -- and the younger generations will observe it, take note, and continue to walk away from institutionalized religion and specifically from the PC USA).
News & Media
While high-level problematic glycopeptide resistance among enterococci was observed initially and continues to increase, the slow creep of vancomycin intermediate susceptibility and the fear of frank resistance among the staphylococci have precipitated increasing work leading to creation of new semisynthetic analogs.
Science
Clinically pigmentation was observed to overcome pars plana and continue to the limbus.
Science
If the international community recognizes Hamas then its members will feel emboldened and continue to observe the call for the destruction of Israel.
News & Media
A steep decline in the number of incident reports was observed in 2001 and continued to drop sharply through 2003.
For the hypoxic group that received Photofrin PDT, no obvious tumor ablation was observed and tumors continued to grow and reached the end point starting at day 4 post-treatment, and all mice reached end point by day 19.
Science
Significant inhibition of GJIC by PFOA was observed after 1 hr, and continued to inhibit GJIC until 24 hr in the acutely treated rats.
Accordingly, an increase of Treg frequency was observed at the baseline and continues to increase in the chronic phase only for those remaining untreated, when compared to HS and EC.
Science
He was able to provide some fresh and very timely evidence in support of natural selection because it explained a phenomenon he had closely observed, one that intrigued him and continues to hold the attention of naturalists today: the close resemblance of some animals to living or inanimate objects.
News & Media
Expression can already be observed in one-cell embryos and continues to about the comma stage, when expression starts to fade out.
Science
Expert writing Tips
Best practice
When describing actions that started in the past and are ongoing, ensure correct grammatical structure, typically requiring an auxiliary verb like 'have'. For instance, use 'have observed and continue to notice' instead of "observed and continue to".
Common error
Avoid omitting auxiliary verbs such as 'have' or 'had' when describing past actions that extend into the present or affect the current state. Using "observed and continue to" without 'have' is grammatically incorrect.
Source & Trust
82%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "observed and continue to", while aiming to describe an ongoing observation, functions incorrectly due to the omission of an auxiliary verb. It's intended use is to link a past observation with a present action or state.
Frequent in
Science
34%
News & Media
33%
Wiki
33%
Less common in
Formal & Business
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "observed and continue to" is flagged by Ludwig as grammatically incorrect due to the absence of an auxiliary verb. While its intent is to convey an ongoing observation, its structural flaw undermines its effectiveness, especially in formal settings. To rectify this, one should use "have observed and continue to" or explore alternatives like "have seen and still" or "have noticed and still do" for clearer and more accurate communication. The phrase appears across various contexts, including science, news, and wiki sources.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
Have observed and still do
Replaces 'continue to' with 'still do', emphasizing the ongoing nature of the observation.
Have noticed and still do
Substitutes 'observed' with 'noticed', making it slightly less formal.
Observed and still observing
Uses a different verb tense ('observing') to maintain the sense of ongoing action.
Observed and subsequently continued to
Adds 'subsequently' to explicitly indicate that the continuation followed the initial observation.
Noticed and proceeded to
Replaces 'observed' with 'noticed' and 'continue' with 'proceeded', offering a formal alternative.
Watched and kept at
Provides a more informal alternative, replacing 'observed' and 'continue' with simpler verbs.
Have seen and still
Uses simpler vocabulary ('seen' instead of 'observed') while maintaining the meaning.
Witnessed and persisted in
Offers a more emphatic and formal alternative, with 'witnessed' and 'persisted'.
Observed and maintained
Replaces 'continue to' with 'maintained', implying a sustained state after the observation.
Recorded and followed through
Suggests a systematic tracking and continuation of the initial observation.
FAQs
What is the correct way to use "observed and continue to" in a sentence?
The phrase "observed and continue to" is grammatically incorrect. It needs an auxiliary verb like 'have' to be correct, such as 'have observed and continue to'. Alternatively, you can rephrase it.
What can I say instead of "observed and continue to"?
You can use alternatives like "have seen and still", "have noticed and still do", or "watched and kept at" depending on the context.
Which is correct, "observed and continue to" or "have observed and continue to"?
"Have observed and continue to" is the correct phrase because it includes the auxiliary verb 'have', which is necessary for proper grammatical structure.
Is there a more formal alternative to "observed and continue to"?
Yes, a more formal alternative would be "have observed and subsequently continued to". This adds a layer of formality and explicitness to the statement.
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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
82%
Authority and reliability
2.8/5
Expert rating
Real-world application tested