Correct usage of "ago" and "back."
141333
"A year ago" versus "a year back"
7226
When to use 'by' instead of 'at' or 'on' to specify time/date?
20656
Difference between (in / for / ∅ / during / over) the (past / last) three years
109854
“have despatched...yesterday” vs. “despatched … yesterday”
54114
When should one use the "recent past"? How much time should have passed?
88468
"Back up data" or "back data up"?
49025
Can the past simple or the present perfect fit in this example with yet
153477
Present Perfect Usage of "Think" for Recent Past
98035
When do I use "was" and when do I use "were"
65426
Difference between Simple Past and Past Perfect
16625
"... that had stopped half an hour ago" VS " ... that had stopped half an hour before/earlier"
557
Should I use the past tense with did?
85473
Past participle used as a noun?
122876
Simple past tense vs. perfect past tense
91575
Past simple vs past perfect; British- vs American English
77813
Using perfect constructions after "since"
41654
Rules for "on", "at", and "in": preposition of time