SN4 ""

No	Pattern	Freq
1	[noun] have been [verb] [prep] years	48
2	[pron] have been [verb] [prep] years	45
3	[pers pn] have been [verb] [prep] years	32
4	[noun sg] have been [verb] [prep] years	22
5	[noun pl] have been [verb] [prep] years	16
6	they have been [verb] [prep] years	8
7	we have been [verb] [prep] years	8
8	we have been [verb] [prep] years	8
9	they have been [verb] [prep] years	8
10	who have been [verb] [prep] years	7
11	who have been [verb] [prep] years	7
12	[noun prp] have been [verb] [prep] years	7
13	[Wh pn] have been [verb] [prep] years	7
14	[conj] have been [verb] [prep] years	6
15	[modal v] have been [verb] [prep] years	6
16	that have been [verb] [prep] years	6
17	[vb mod] have been [verb] [prep] years	6
18	[that] have been [verb] [prep] years	6
19	that have been [verb] [prep] years	6
20	i have been [verb] [prep] years	5
21	i have been [verb] [prep] years	5
22	[verb] have been [verb] [prep] years	5
23	have [adv] been [verb] [prep] years	15
24	have not been [verb] [prep] years	11
25	have [not/n't] been [verb] [prep] years	11
26	have not been [verb] [prep] years	7
27	have been [adv] [verb] [prep] years	6
28	have been [adv] [verb] [prep] years	6
29	have been [verb] [adv] [prep] years	44
30	have been [verb] [pers pn] [prep] years	29