SN4 ""

No	Pattern	Freq
1	[vb mod] have been [prep] [det]	105
2	[modal v] have been [prep] [det]	104
3	[modal v] have been in [det]	31
4	must have been [prep] [det]	26
5	must have been [prep] [det]	26
6	would have been [prep] [det]	25
7	[modal v] have been [prep] that	24
8	would have been [prep] [det]	23
9	[modal v] have been [prep] this	23
10	could have been [prep] [det]	21
11	could have been [prep] [det]	21
12	[modal v] have been [prep] some	18
13	[modal v] have been [prep] any	15
14	[modal v] have been at [det]	13
15	may have been [prep] [det]	13
16	may have been [prep] [det]	13
17	might have been [prep] [det]	10
18	might have been [prep] [det]	10
19	[modal v] have been of [det]	10
20	[modal v] have been like [det]	9
21	[modal v] have been on [det]	7
22	[modal v] have been to [det]	5
23	should have been [prep] [det]	5
24	should have been [prep] [det]	5
25	[modal v] have been for [det]	5