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
I testing
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "I testing" is not correct in English.
Did you mean "I am testing"? If this is the case, you can use this phrase when you want to indicate that you are currently in the process of testing something. Example: "I am testing the new software to ensure it functions properly before the launch."
⚠ May contain grammatical issues
Science
News & Media
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
44 human-written examples
The present work sought to extend past research by (i) testing a model of motivational processes based on the tenets of self-determination theory (SDT; Deci & Ryan [1991. A motivational approach to self: Integration in personality. In R. Dienstbier (Ed)., Nebraska symposium on motivation. Vol. 38. Perceptives on motivation (pp. 237 288).
Variables included: (i) Testing conditions – exposure time and concentration and (ii) Network training conditions – training compendium modifications.
Science
Nonetheless, we suggest that many of the 'moderate' predictions are valid as potential cell modulators: (i) testing proteins of the venomous snake proteins indicated many validated toxins to be assigned to the 'moderate' class (Naamati et al., 2009).
Science
The optimal substrate was then used for (i) testing recombinantly expressed POMGnT1 mutant enzymes for activity, (ii) determining the kinetic parameters of the active POMGnT1 variants, and (iii) evaluating the possibility of correlating genotype with the obtained biochemical data.
Science
The experiments reported in this paper were aimed at: (i) testing the possibility that the strength of the antineoplastic action of ribonucleases could be directly correlated with the degree of tumour cell malignancy; (ii) comparing the effects of RNases with those of doxorubicin, a conventional anticancer drug.
Science
In this paper, the performance of the TiC-P is evaluated by addressing the following issues: i) testing the feasibility (practicality) of the questionnaire; ii) assessing the reliability of the questionnaire; and iii) assessing the construct validity of the TiC-P.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
16 human-written examples
I tested it myself.
News & Media
I tested five brands.
News & Media
I tested positive.
News & Media
"I tested it.
News & Media
I tested myself constantly.
News & Media
Expert writing Tips
Best practice
Always use the correct verb tense when describing the action of testing. Use "I am testing" for ongoing actions, "I tested" for completed actions, and "I will test" for future actions.
Common error
Avoid omitting auxiliary verbs (such as "am", "is", "are", "was", "were") before "testing". Saying “I testing” is grammatically incorrect; instead, use “I am testing” or another appropriate tense.
Source & Trust
81%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The primary grammatical function of the incorrect phrase "I testing" attempts to convey an action being performed by the speaker. Ludwig AI suggests that the correct usage requires an auxiliary verb, as indicated by Ludwig's examples of similar phrases.
Frequent in
Science
38%
News & Media
35%
Wiki
7%
Less common in
Formal & Business
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "I testing" is grammatically incorrect and should be avoided in formal writing. The correct form requires an auxiliary verb, such as "am", "was", or "will". Although it appears in various sources, including science and news media, this does not validate its use. As pointed out by Ludwig AI, it's important to use the correct verb tense (e.g., "I am testing", "I tested", "I will test") to ensure clarity and grammatical accuracy. Remember to proofread and correct such errors to maintain credibility in your writing.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
I am testing
Adds the auxiliary verb "am" to create the present continuous tense, indicating an action in progress.
I was testing
Uses the past continuous tense to describe an action that was happening in the past.
I will test
Employs the future tense to indicate a planned action of testing.
I have tested
Uses the present perfect tense to indicate a completed action with present relevance.
I perform testing
Replaces "test" with the verb "perform" to describe the action of conducting tests.
I conduct a test
Uses "conduct" to describe carrying out a test, changing the structure slightly.
I am performing a test
Combines continuous aspect with "perform a test" for emphasis on ongoing action.
I evaluate
Substitutes "testing" with "evaluate", focusing on the assessment aspect.
I check
Uses the simpler verb "check" to convey a quick assessment.
I analyze
Replaces "testing" with "analyze", emphasizing a more in-depth examination.
FAQs
How can I correctly use "I testing" in a sentence?
The phrase "I testing" is grammatically incorrect. You should use the present continuous form "I am testing" or another appropriate tense, such as "I tested" or "I will test", depending on the context.
What are some alternatives to "I testing"?
Depending on the context, you can use phrases like "I am testing", "I tested", "I will test", or "I am evaluating".
Is "I testing" grammatically correct?
No, "I testing" is not grammatically correct. The correct form requires an auxiliary verb, such as in "I am testing".
What is the difference between "I testing" and "I am testing"?
"I testing" is grammatically incorrect and should not be used. "I am testing" is the correct present continuous form, indicating an action in progress.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
81%
Authority and reliability
2.8/5
Expert rating
Real-world application tested