SN4 ""

No	Pattern	Freq
1	[pers pn] [vb mod] have been [adv]	1118
2	it [vb mod] have been [adv]	526
3	[pers pn] would have been [adv]	458
4	[pers pn] must have been [adv]	254
5	he [vb mod] have been [adv]	160
6	i [vb mod] have been [adv]	134
7	[pers pn] [vb mod] have been more	115
8	they [vb mod] have been [adv]	107
9	she [vb mod] have been [adv]	106
10	[pers pn] should have been [adv]	103
11	[pers pn] could have been [adv]	97
12	[pers pn] might have been [adv]	95
13	[pers pn] [vb mod] have been very	87
14	[pers pn] [vb mod] have been there	71
15	[pers pn] 'd have been [adv]	68
16	you [vb mod] have been [adv]	65
17	[pers pn] may have been [adv]	62
18	[pers pn] [vb mod] have been quite	57
19	[pers pn] [vb mod] have been too	54
20	[pers pn] [vb mod] have been so	48
21	we [vb mod] have been [adv]	45
22	[pers pn] [vb mod] have been here	42
23	[pers pn] [vb mod] have been just	40
24	[pers pn] [vb mod] have been about	35
25	[pers pn] [vb mod] have been much	32
26	[pers pn] [vb mod] have been all	32
27	[pers pn] [vb mod] 've been [adv]	27
28	[pers pn] [vb mod] have been as	27
29	[pers pn] [vb mod] have been better	26
30	[pers pn] [vb mod] have been even	22