SN4 ""

No	Pattern	Freq
1	[pron] may have [been] the [adj]	22
2	[noun] may have [been] the [adj]	19
3	[adj] may have [been] the [adj]	15
4	[pers pn] may have [been] the [adj]	14
5	[noun sg] may have [been] the [adj]	13
6	[det] may have [been] the [adj]	11
7	it may have [been] the [adj]	8
8	it may have [been] the [adj]	8
9	this may have [been] the [adj]	7
10	this may have [been] the [adj]	7
11	[Wh det] may have [been] the [adj]	5
12	may [adv] have [been] the [adj]	30
13	may not have [been] the [adj]	16
14	may not have [been] the [adj]	16
15	may [not/n't] have [been] the [adj]	16
16	may [adv] have [been] the [adj]	14
17	may well have [been] the [adj]	9
18	may well have [been] the [adj]	9
19	may have [been] [prep] the [adj]	11
20	may have [been] [prep] the [adj]	11
21	may have [been] in the [adj]	8
22	may have [been] in the [adj]	8
23	may have [been] [verb] the [adj]	5
24	may have [been] the [adj] [adj]	5
25	may have [been] the [adj] [noun]	49
26	may have [been] the [adj] [noun sg]	43
27	may have [been] the [adj] man	5
28	may have [been] the [adj] man	5
29	may have [been] the [adj] [adj]	5
30	may have [been] the [adj] [adj]	5