SN4 ""

No	Pattern	Freq
1	may have been [vb pp] [prep]	550
2	may have been [vb pp] [prep]	550
3	may have been [vb pp] by	211
4	may have been [vb pp] by	211
5	may have been [vb pp] in	77
6	may have been [vb pp] in	77
7	may have been [vb pp] to	53
8	may have been [vb pp] to	53
9	may have been [vb pp] with	41
10	may have been [vb pp] with	41
11	may have been [vb pp] for	27
12	may have been [vb pp] for	27
13	may have been [vb pp] from	26
14	may have been [vb pp] from	26
15	may have been [vb pp] on	24
16	may have been [vb pp] on	24
17	may have been [vb pp] as	23
18	may have been [vb pp] as	23
19	may have been used [prep]	22
20	may have been influenced [prep]	19
21	may have been caused [prep]	19
22	may have been made [prep]	18
23	may have been [vb pp] at	15
24	may have been [vb pp] at	15
25	may have been [vb pp] into	10
26	may have been [vb pp] into	10
27	may have been written [prep]	10
28	may have been related [prep]	8
29	may have been produced [prep]	8
30	may have been connected [prep]	7