SN4 ""

No	Pattern	Freq
1	[pron] [vb mod] have been [prep] [det]	60
2	[pron] [modal v] have been [prep] [det]	60
3	[pron] [modal v] have been [prep] [det]	59
4	[pers pn] [modal v] have been [prep] [det]	55
5	it [modal v] have been [prep] [det]	31
6	it [modal v] have been [prep] [det]	31
7	[pron] must have been [prep] [det]	21
8	[pron] must have been [prep] [det]	21
9	[pron] [modal v] have been [prep] this	17
10	[pron] would have been [prep] [det]	14
11	[pron] [modal v] have been in [det]	13
12	[pron] [modal v] have been [prep] that	13
13	[pron] [modal v] have been in [det]	13
14	[pron] would have been [prep] [det]	12
15	[pron] [modal v] have been [prep] any	10
16	[pron] [modal v] have been [prep] some	10
17	he [modal v] have been [prep] [det]	9
18	he [modal v] have been [prep] [det]	9
19	[pron] [modal v] have been at [det]	9
20	[pron] [modal v] have been at [det]	9
21	[pron] [modal v] have been like [det]	8
22	[pron] could have been [prep] [det]	8
23	[pron] could have been [prep] [det]	8
24	[pron] [modal v] have been like [det]	8
25	they [modal v] have been [prep] [det]	6
26	they [modal v] have been [prep] [det]	6
27	[pron] [modal v] have been of [det]	5
28	[pron] may have been [prep] [det]	5
29	[pron] might have been [prep] [det]	5
30	[pron] [modal v] have been of [det]	5