might not have + PAST PARTICIPLE (past possibility)

There are a few similar points in the category of MODALITY in the English Grammar Profile at C1.

‘might not have’ + ‘-ed’ to talk about possibility with a past reference


A search in iWeb for:

might _XX have _VVN

1 MIGHT NOT HAVE KNOWN 1208
2 MIGHT NOT HAVE THOUGHT 1156
3 MIGHT NOT HAVE HEARD 1113
4 MIGHT NOT HAVE CONSIDERED 768
5 MIGHT NOT HAVE SEEN 731
6 MIGHT NOT HAVE NOTICED 692
7 MIGHT NOT HAVE MADE 511
8 MIGHT NOT HAVE HAPPENED 452
9 MIGHT NOT HAVE GOTTEN 373
10 MIGHT NOT HAVE COME 304
11 MIGHT NOT HAVE REALIZED 301
12 MIGHT NOT HAVE GONE 292
13 MIGHT NOT HAVE FOUND 246
14 MIGHT NOT HAVE EXPECTED 237
15 MIGHT NOT HAVE TAKEN 225
16 MIGHT NOT HAVE WON 174
17 MIGHT NOT HAVE WORKED 170
18 MIGHT NOT HAVE TRIED 167

19 MIGHT NOT HAVE OCCURRED 160

And, what might not have occurred to you is, what are the logistics really like of working on another planet.

20 MIGHT NOT HAVE WANTED 156
21 MIGHT NOT HAVE GOT 154
22 MIGHT NOT HAVE SURVIVED 137
23 MIGHT NOT HAVE FELT 129
24 MIGHT NOT HAVE GIVEN 122
25 MIGHT NOT HAVE LOOKED 120
26 MIGHT NOT HAVE SEEMED 110
27 MIGHT NOT HAVE UNDERSTOOD 108
28 MIGHT NOT HAVE LIKED 104
29 MIGHT NOT HAVE RECEIVED 101
30 MIGHT NOT HAVE USED 100
31 MIGHT NOT HAVE PLAYED 100
32 MIGHT NOT HAVE EXISTED 95
33 MIGHT NOT HAVE REALISED 94
34 MIGHT NOT HAVE MET 93
35 MIGHT NOT HAVE CHANGED 91

B2 vocabulary: occurred, survived