SN4 ""

No	Pattern	Freq
1	[pron] may have been [adj] [noun]	33
2	there may have been [adj] [noun]	19
3	[ex0] may have been [adj] [noun]	19
4	there may have been [adj] [noun]	19
5	[noun] may have been [adj] [noun]	16
6	[noun pl] may have been [adj] [noun]	10
7	[pers pn] may have been [adj] [noun]	8
8	[Wh det] may have been [adj] [noun]	5
9	may [adv] have been [adj] [noun]	10
10	may [adv] have been [adj] [noun]	9
11	may well have been [adj] [noun]	5
12	may well have been [adj] [noun]	5
13	may have been [art] [adj] [noun]	116
14	may have been [art] [adj] [noun]	116
15	may have been a [adj] [noun]	80
16	may have been a [adj] [noun]	59
17	may have been the [adj] [noun]	35
18	may have been the [adj] [noun]	35
19	may have been an [adj] [noun]	21
20	may have been [adj] [adj] [noun]	14
21	may have been [prep] [adj] [noun]	14
22	may have been [prep] [adj] [noun]	14
23	may have been [det] [adj] [noun]	10
24	may have been some [adj] [noun]	9
25	may have been some [adj] [noun]	9
26	may have been of [adj] [noun]	7
27	may have been of [adj] [noun]	7
28	may have been in [adj] [noun]	6
29	may have been in [adj] [noun]	6
30	may have been [adj] [prep] [noun]	35