Past perfect vs Present perfect
1863
How do the tens­es and as­pects in English cor­re­spond tem­po­ral­ly to one an­oth­er?
157375
Had been/have been... tenses agreement
122876
Simple past tense vs. perfect past tense
6542
Dilemma: Present Perfect Or Perfect Continuous?
16395
when to used had been and have been
508
"Have been doing" and "have done"
49302
before/after + past or past perfect
91575
Past simple vs past perfect; British- vs American English
82982
past simple vs past perfect
22902
Difference in meaning and use of future perfect forms
93810
How is "I have come" + infinitive different from Present Perfect?
23670
Present Perfect vs. Present Perfect Continuous
104764
Use of Past Simple vs Past perfect in sentences with since
55792
Present Perfect vs Present perfect continuous
23177
Tense change: previous actions on something that's currently true
123263
"Now" vs "by now"
118206
Simple past vs. past perfect