What have you done or what did you do?
40839
Difference between Present Perfect and Past Simple ( I am not a beginner )
29553
A number of questions "has been" or "have been" asked?
6457
What is the question form of "used to do"?
23132
"Why didn't (or did not) somebody do something?" or "Why did somebody not do something?"
33410
Replacing "do you have" with "have you"
85899
Should I say "what does it means" or "what does it mean"?
4406
What are the grammatical rules determining whether to use "which" or "what"?
70600
“What I saw was…” vs “What I saw were…”
156987
Response to "How you doing?"?
119136
"done" vs "have done"
104245
did + present tense (or ) Past tense of the verb
40342
'Have just finished' vs. 'Just finished': What is the difference?
33649
"Where did you buy it?" or "where did you buy it from?"
508
"Have been doing" and "have done"
66988
"Which" or "what" or ... when referring to a main clause?
109833
Is "What happened to him" correct?
22092
Why do we use 'did' with questions using the simple past tense?