Question

Which of the following is not an irregular verb?

• A. Slay
• B. Slew
• C. Slain
• D. Slip

Answer 1

The correct option is D Slip

'Slay' is the base form of the verb, its past form is 'slew' and its past participle form is 'slain'. Slay is an irregular verb as its past and its past participle form is not formed with the addition of -ed at the end of the base form of the verb.
Therefore, option A 'slay', option B 'slew' and option C 'slain' are incorrect.
The correct option is option D, 'slip' as its past and past participle form is 'slipped'. It is not an irregular but a regular verb because we've simply added an -ed to form the past and past participle form of the base verb 'slip'.