"Why Londoners didn't understand Frieda?" vs. "Why didn't Londoners understand Frieda?"
655
"How it works?" vs. "How does it work?"
131588
"It’s not perfectly clear to me what it is you’re trying to say" vs. "It’s not perfectly clear to me what you’re trying to say"
95609
Unsure whether to use "enquire" or "inquire"
92736
Comparing negatives: "she seems not to know" vs. "she doesn't seem to know"
148404
"I don't think you X" versus "I think you don't X"
120089
"as bad at English as me" vs. "as bad at English as I"
105806
Did + multiple bare infinitives in a question
23132
"Why didn't (or did not) somebody do something?" or "Why did somebody not do something?"
157446
"Can" vs. "could" in asking a question
46644
Was or is? Confusion
22309
What vs. Which - correct usage in questions
34503
"What day is it today?" vs. "What day is today?"
122849
When do you use “learnt” and when “learned”?
19721
'He don't have knowledge ' vs 'He doesn't have knowledge'
28837
What is the difference between "Have you seen this?" and "Did you see this?"
71914
"Didn't use to get" or "Didn't used to get"?
77991
"Knowledge of" vs. "knowledge on"