SN4 ""

No	Pattern	Freq
1	[vb mod] have been [vb pp] [det]	44
2	[modal v] have been [vb pp] [det]	42
3	would have been [vb pp] [det]	10
4	[modal v] have been [vb pp] this	9
5	would have been [vb pp] [det]	9
6	[modal v] have been [vb pp] that	8
7	could have been [vb pp] [det]	7
8	should have been [vb pp] [det]	7
9	could have been [vb pp] [det]	7
10	should have been [vb pp] [det]	7
11	might have been [vb pp] [det]	6
12	[modal v] have been [vb pp] many	6
13	might have been [vb pp] [det]	6
14	may have been [vb pp] [det]	5
15	[modal v] have been [vb pp] some	5
16	[modal v] have been given [det]	5
17	[modal v] have been [vb pp] all	5
18	may have been [vb pp] [det]	5