Origin of perfect tense
53495
Why is 'present perfect' present if it happened in the past? And why is it 'perfect'?
47662
Present perfect for past action with present effect
34145
Perfect infinitive
7461
Sequence of Tense
23670
Present Perfect vs. Present Perfect Continuous
49302
before/after + past or past perfect
100914
present perfect + past simple in the same sentence
145971
What is the tense of "I would have been happy to..."?
119517
What's the difference between the simple past tense and the present perfect?
100002
Past Simple vs. Present Perfect
3742
What is the origin of auxiliary verbs?
77020
Generalised rule for verb usage in simple present tense using participle
62252
Simple past vs Perfect Past
153687
What tense should I use to describe something in the past but probably is still true?
152550
present tense with past perfect?
74869
backshifting of tenses (optional back shifting)
21041
past simple or past perfect why