SN4 ""

No	Pattern	Freq
1	[pers pn] [vb mod] have been [prep] [det]	55
2	[pers pn] [modal v] have been [prep] [det]	55
3	[pers pn] [modal v] have been [prep] [det]	54
4	it [modal v] have been [prep] [det]	31
5	[pers pn] must have been [prep] [det]	19
6	[pers pn] must have been [prep] [det]	19
7	[pers pn] [modal v] have been [prep] this	17
8	[pers pn] would have been [prep] [det]	14
9	[pers pn] [modal v] have been [prep] that	13
10	[pers pn] [modal v] have been in [det]	12
11	[pers pn] [modal v] have been in [det]	12
12	[pers pn] would have been [prep] [det]	12
13	he [modal v] have been [prep] [det]	9
14	[pers pn] [modal v] have been like [det]	8
15	[pers pn] [modal v] have been [prep] any	8
16	[pers pn] [modal v] have been at [det]	8
17	[pers pn] [modal v] have been at [det]	8
18	[pers pn] [modal v] have been like [det]	8
19	[pers pn] [modal v] have been [prep] some	7
20	they [modal v] have been [prep] [det]	6
21	[pers pn] could have been [prep] [det]	5
22	[pers pn] may have been [prep] [det]	5
23	[pers pn] might have been [prep] [det]	5
24	[pers pn] could have been [prep] [det]	5
25	[pers pn] may have been [prep] [det]	5
26	[pers pn] might have been [prep] [det]	5