SN4 ""

No	Pattern	Freq
1	[vb mod] have been [prep] [adj] [noun]	121
2	[modal v] have been [prep] [adj] [noun sg]	99
3	[modal v] have been [prep] [adj] [noun]	60
4	[modal v] have been in [adj] [noun]	58
5	[modal v] have been [prep] [det] [noun]	53
6	would have been [prep] [adj] [noun]	32
7	would have been [prep] [adj] [noun]	31
8	must have been [prep] [adj] [noun]	28
9	must have been [prep] [adj] [noun]	28
10	[modal v] have been of [adj] [noun]	22
11	may have been [prep] [adj] [noun]	21
12	may have been [prep] [adj] [noun]	21
13	[modal v] have been [prep] [adj] [noun pl]	21
14	could have been [prep] [adj] [noun]	19
15	could have been [prep] [adj] [noun]	19
16	[modal v] have been [prep] this [noun]	16
17	[modal v] have been [prep] this [noun]	16
18	[modal v] have been at [adj] [noun]	13
19	might have been [prep] [adj] [noun]	12
20	might have been [prep] [adj] [noun]	12
21	[modal v] have been [prep] some [noun]	11
22	[modal v] have been [prep] that [noun]	11
23	[modal v] have been [prep] some [noun]	11
24	[modal v] have been [prep] that [noun]	11
25	[modal v] have been [prep] [adj] trouble	10
26	[modal v] have been [prep] [adj] trouble	10
27	[modal v] have been [prep] [adj] time	7
28	[modal v] have been [prep] any [noun]	7
29	[modal v] have been [prep] any [noun]	7
30	[modal v] have been for [adj] [noun]	6