SN4 ""

No	Pattern	Freq
1	[pers pn] [vb mod] have been [prep]	592
2	[pers pn] [modal v] have been [prep]	592
3	[pers pn] would have been [prep]	203
4	[pers pn] would have been [prep]	168
5	[pers pn] must have been [prep]	154
6	[pers pn] must have been [prep]	154
7	[pers pn] should have been [prep]	73
8	[pers pn] should have been [prep]	73
9	[pers pn] might have been [prep]	62
10	[pers pn] might have been [prep]	62
11	[pers pn] may have been [prep]	43
12	[pers pn] may have been [prep]	43
13	[pers pn] could have been [prep]	41
14	[pers pn] could have been [prep]	41
15	[pers pn] [verb] have been [prep]	40
16	[pers pn] [pron] have been [prep]	38
17	[pers pn] 'd have been [prep]	35
18	[pers pn] [pers pn] have been [prep]	25
19	[pers pn] [adv] have been [prep]	20
20	[pers pn] [adv] have been [prep]	20
21	[pers pn] [vb -s] have been [prep]	18
22	[pers pn] [vb base] have been [prep]	15
23	[pers pn] seem have been [prep]	14
24	[pers pn] will have been [prep]	11
25	[pers pn] he have been [prep]	10
26	[pers pn] he have been [prep]	10
27	[pers pn] seems have been [prep]	9
28	[pers pn] who have been [prep]	8
29	[pers pn] [Wh pn] have been [prep]	8
30	[pers pn] who have been [prep]	8