SN4 ""

No	Pattern	Freq
1	[pron] may have been [det] [noun]	20
2	there may have been [det] [noun]	15
3	there may have been [det] [noun]	15
4	[ex0] may have been [det] [noun]	15
5	it may have been [det] [noun]	5
6	[pers pn] may have been [det] [noun]	5
7	it may have been [det] [noun]	5
8	may [adv] have been [det] [noun]	8
9	may [adv] have been [det] [noun]	7
10	may have been [prep] [det] [noun]	7
11	may have been [prep] [det] [noun]	7
12	may have been [verb] [det] [noun]	5
13	may have been [det] [adj] [noun]	10
14	may have been [det] [adj] [noun]	10
15	may have been [det] [noun] [prep]	7
16	may have been [det] [noun] [prep]	7
17	may have been [det] [noun] [conj]	5