The movie was funny and I __________.
A. could help laughing B. couldn't help laughed C. couldn't help laughing D. could helped laughed
GATE 2022 · General Aptitude · Most Appropriate Word · medium
Answer: C. couldn't help laughing
Identify the idiom pattern: The standard English idiom is 'cannot/could not help + gerund (verb-ing)' meaning 'to be unable to stop or control an action'. The gerund form is mandatory after 'help' in this construction.
Apply context: the movie was funny: Since the movie was funny, the speaker was overcome by laughter and could NOT stop. This requires the negative form 'couldn't help laughing'. Option A ('could help laughing') would mean the speaker was able to stop laughing — wrong meaning given the context.
Check verb form in each option: B: 'couldn't help laughed' — wrong; 'laughed' (past tense/participle) cannot follow 'help' in this idiom. D: 'could helped laughed' — doubly wrong; 'could helped' is not a valid modal phrase. C: 'couldn't help laughing' — correct idiom with correct gerund form.