SN4 ""

No	Pattern	Freq
1	[pron] [vb mod] have been in	250
2	[pron] [modal v] have been in	250
3	[pron] [modal v] have been in	247
4	[pers pn] [modal v] have been in	215
5	[pron] would have been in	82
6	[pron] would have been in	70
7	it [modal v] have been in	65
8	it [modal v] have been in	65
9	[pron] must have been in	51
10	[pron] must have been in	51
11	he [modal v] have been in	47
12	he [modal v] have been in	47
13	[pron] might have been in	37
14	[pron] might have been in	37
15	they [modal v] have been in	37
16	they [modal v] have been in	35
17	[pron] should have been in	30
18	[pron] should have been in	30
19	she [modal v] have been in	24
20	she [modal v] have been in	24
21	[pron] could have been in	22
22	[pron] could have been in	22
23	i [modal v] have been in	21
24	i [modal v] have been in	21
25	[pron] may have been in	20
26	[pron] may have been in	20
27	you [modal v] have been in	13
28	you [modal v] have been in	13
29	[pron] 'd have been in	12
30	who [modal v] have been in	12