Past perfect as explanation
8497
When is the past perfect exactly needed?
93683
Using Past Simple (verb to be) for Unreal (Counterfactual) Past Situations
43333
just(recently) + present perfect or simple past
27613
Past Perfect Continuous/Past Perfect or?
12613
How to use "had" correctly in a past perfect paragraph?
73018
To tell about a guess about a case in the past, why use "would+have+past participle" instead of "must+have+past participle?
26184
Why do we use the base form of verbs instead of the past form in past tense questions?
153687
What tense should I use to describe something in the past but probably is still true?
152550
present tense with past perfect?
65426
Difference between Simple Past and Past Perfect
96368
Simple Past vs. Present Perfect
10955
Past simple vs present perfect
97441
Present perfect or simple past?
140181
Past tense and the phrase "who knows what"
127184
Present-perfect-tense vs. Simple-past-tense
66188
Mixing past tenses in the same sentence
136402
past tense and/or conditional