Choosing the correct verb form between was undertook and was undertaken can be confusing, especially for learners of English or even for native speakers who aren’t familiar with irregular verb structures. This question touches on verb tenses, voice (active vs passive), and proper grammatical agreement. Understanding the difference between undertook and undertaken, and knowing when to use each, is essential for writing clearly and accurately in English. This topic will break down the grammar behind these verb forms, explain their usage with examples, and clarify once and for all which phrase is correct was undertook or was undertaken.
Understanding the Verb Undertake”
Undertake is an irregular verb, which means its past tense and past participle forms do not follow the usual “-ed” pattern. To use this verb correctly, it’s important to learn all three principal forms
- Base formundertake
- Past simpleundertook
- Past participleundertaken
The verb “undertake” means to take on or commit oneself to a task, responsibility, or duty. For example
- Theyundertakenew projects every year. (present)
- Sheundertookthe research on her own. (past)
- The operation has beenundertakenby a team of experts. (past participle)
Was Undertook or Was Undertaken Which Is Correct?
The correct form iswas undertaken.The phrase was undertook is grammatically incorrect. Here’s why when using passive voice, we must use thepast participleform of the verb, not the past simple form. Since undertaken is the past participle of undertake, it is the correct choice.
Why Was Undertook Is Incorrect
Undertook is the simple past tense of the verb undertake. It is only used in active voice sentences where the subject performs the action. Using it after was is a mistake because was signals passive voice, which always requires the past participle.
Incorrect example
- The projectwas undertooklast year. â
Why Was Undertaken Is Correct
Was undertaken is correct because it follows the structure of the passive voice. In passive voice, the formula is
to be + past participle
In this structure
- was = past tense form of to be
- undertaken = past participle of undertake
Correct example
- The projectwas undertakenby the engineering team. â
Active vs. Passive Voice with Undertake
To understand when to use undertook versus undertaken, it’s important to understand the difference between active and passive voice.
Active Voice
In active voice, the subject performs the action. Use undertook in this case.
Example
- The companyundertooka full system upgrade last month.
Passive Voice
In passive voice, the subject receives the action. Use was undertaken (or were undertaken for plural subjects).
Examples
- A major renovationwas undertakenby the city council.
- Several studieswere undertakenin 2020.
Other Forms and Tenses of Undertake
To use the verb “undertake” properly in different tenses and grammatical situations, it’s helpful to see how the correct forms are applied
Present Simple
- Iundertakeall responsibilities personally.
Past Simple
- Theyundertookthe difficult task without hesitation.
Present Perfect
- Hehas undertakenseveral leadership roles in the past.
Past Perfect
- By the time the report was due, shehad undertakenall the required research.
Future Perfect
- By next year, the organizationwill have undertakenmultiple sustainability projects.
Passive Voice (All Tenses)
- The auditis undertakenevery six months. (present)
- The taskwas undertakenyesterday. (past)
- The renovationhas been undertakenrecently. (present perfect)
- The analysishad been undertakenbefore the meeting. (past perfect)
Tips for Avoiding Confusion
When dealing with irregular verbs like undertake, it’s easy to confuse the past tense with the past participle. Here are a few simple strategies to help avoid mistakes
- Memorize the three principal parts undertake – undertook – undertaken.
- Remember that passive voice always needs the past participle.
- Use context clues If was, is, were, been, or being is in the sentence, you’ll likely need a past participle.
- Practice with similar irregular verbs to build familiarity.
Other Irregular Verbs with Similar Patterns
Undertake is not the only verb that follows this irregular structure. Here are a few more verbs with similar conjugation patterns
- Begin – Began – Begun
- Choose – Chose – Chosen
- Speak – Spoke – Spoken
- Drive – Drove – Driven
- Write – Wrote – Written
Just like undertake, these verbs also require the past participle in passive constructions.
Real-World Examples Using “Was Undertaken”
Here are examples from common professional, academic, and casual contexts that correctly use was undertaken
- The researchwas undertakenover a period of two years.
- Constructionwas undertakento improve infrastructure.
- A detailed reviewwas undertakenbefore approval.
- The missionwas undertakenby a team of international scientists.
These examples show how was undertaken is widely used in formal writing, especially in academic, technical, and governmental documents.
In summary, was undertaken is the grammatically correct phrase, while was undertook is incorrect. The reason lies in understanding the verb forms of undertake and recognizing when to use active or passive voice. Since undertaken is the past participle, it is the appropriate choice in passive constructions. Knowing these grammar rules not only helps avoid mistakes but also improves clarity and professionalism in writing. Whether you’re drafting a report, writing an email, or preparing for an exam, using was undertaken instead of was undertook shows a strong command of English verb usage.