is the following statement using a regular or irregular verb and why

Some athletes have taken drug tests to prove they are not on steroids.

5b. Some athletes have took drug tests to prove they are not on steroids.

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The statement "Some athletes have took drug tests to prove they are not on steroids" uses an irregular verb.

The correct form should be "Some athletes have taken drug tests to prove they are not on steroids."

To determine if a verb is regular or irregular, we need to understand how it changes in different tenses. Regular verbs follow a predictable pattern, where the past tense is formed by adding "-ed" or "-d" to the base form, while irregular verbs do not follow this pattern.

In this case, the base form of the verb is "take." In the past tense, the regular form would be "took." However, "took" is not the correct past tense form for the verb "take"; the irregular past tense form of "take" is "taken." Therefore, "taken" is the correct past participle used in the sentence, making it an irregular verb.