being vs. having been (vs. having been being)
102512
What is the difference between "being" and "having been" in this context?
151460
Difference between "was to . . ." and "was to have"
92969
"got" vs. "have got"
88730
can't have been vs. couldn't have been
97441
Present perfect or simple past?
10955
Past simple vs present perfect
47408
Difference between "been to" and "been in"
138033
whether it be vs whether it is
1645
Present Simple or Present Continuous with "these days"
46651
There has vs. There have
149189
"I have been 'verb-ing'" vs. "I had been 'verb-ing'"
3233
When to use the present or the past perfect tense?
90495
Have lived vs. Have been living
71690
"Is" vs "has been" in English
10637
difference between "Have been" and "was"
80810
Why must “has” come before the main verb here?
130767
"need + verb-ing" vs "need + [to be] + verb-ed"