SN4 ""

No	Pattern	Freq
1	[noun] have [been] [verb] for years	22
2	[noun pl] have [been] [verb] for years	14
3	[pron] have [been] [verb] for years	7
4	[pers pn] have [been] [verb] for years	5
5	have [been] [verb] [pers pn] for years	10
6	have [been] [verb] [pron] for years	10
7	have [been] [verb] [adv] for years	8
8	have [been] [verb] they for years	6
9	have [been] [verb] them for years	6
10	have [been] [verb] [adv] for years	6
11	have [been] [verb] for [adj] years	48
12	have [been] [verb] for [num] years	25
13	have [been] [verb] for [det] years	23
14	have [been] [verb] for many years	15
15	have [been] [verb] for many years	15
16	have [been] [verb] for two years	7
17	have [been] [verb] for two years	7
18	have [been] [verb] for several years	5
19	have [been] [verb] for several years	5
20	have [been] [verb] for years [prep]	12
21	have [been] [verb] for years [prep]	12
22	have [been] [verb] for years [to-vb]	7
23	have [been] [verb] for years [verb]	7