Multiple choice Directions: Fill up the blank with appropriate word. Will you please _______ the light? switch off switched off switching off switch of Reveal answer Fill a bubble to check yourself A Correct answer Explanation After 'please', we use the base form of the verb without 'to' (bare infinitive). 'Switch off' is the correct base form. 'Switched off' is past tense, 'switching off' is present participle, and 'switch of' is grammatically incorrect.