SN4 ""

No	Pattern	Freq
1	[pron] [vb mod] have been at	86
2	[pron] [modal v] have been at	86
3	[pron] must have been at	24
4	[pron] must have been at	24
5	[pron] would have been at	23
6	[pron] would have been at	20
7	[pron] [noun] have been at	20
8	[pron] should have been at	15
9	[pron] should have been at	15
10	[pron] [pron] have been at	14
11	[pron] [noun sg] have been at	12
12	[pron] [verb] have been at	10
13	[pron] [pers pn] have been at	9
14	[pron] may have been at	9
15	[pron] may have been at	9
16	[pron] could have been at	8
17	[pron] could have been at	8
18	[pron] might have been at	6
19	[pron] might have been at	6
20	[pron] [noun pl] have been at	5
21	[pron] [adv] have been at	5
22	[pron] [adv] have been at	5
23	[pron] [vb -s] have been at	5
24	[conj] [pron] have been at	142
25	[subord] [pron] have been at	96
26	[noun] [pron] have been at	68
27	[noun sg] [pron] have been at	35
28	that [pron] have been at	28
29	[that] [pron] have been at	28
30	that [pron] have been at	28