Question

Which of the following is not a regular verb?

• A. Working
• B. Work
• C. Worked
• D. Wrung

Answer 1

The correct option is D Wrung

'Work' is the base form of the verb, its past form is 'worked' and its past participle form is 'worked'. Work is a regular verb because its past and past participle form is formed with the addition of -ed at the end of the base form of the verb.
Therefore, options B 'work' and option C 'worked' are incorrect, whereas, working is the continuous form of the verb 'work', therefore option A is incorrect.
The correct option is option D, 'wrung' as it is the past participle form of the base verb 'wring'. It is an irregular verb as its past and past participle form is not formed with the addition of -ed at the end of the base form of the verb.