SN4 ""

No	Pattern	Freq
1	have been [verb] for [adj] years	301
2	have been [verb] for [num] years	195
3	have been [vb pp] for [adj] years	162
4	have been [v-ing] for [adj] years	139
5	has been [verb] for [adj] years	135
6	have been [verb] for [det] years	106
7	had been [verb] for [adj] years	80
8	have been [verb] for many years	63
9	have been [verb] for many years	63
10	have been [verb] for [adj] years	48
11	have been [verb] for two years	26
12	have been jail for [adj] years	26
13	have been [verb] for two years	26
14	have been jailed for [adj] years	26
15	have been [verb] for three years	25
16	have been [verb] for three years	25
17	have been [verb] for some years	24
18	have been [verb] for some years	24
19	have been run for [adj] years	20
20	have been [verb] for several years	19
21	have been [verb] for several years	19
22	've been [verb] for [adj] years	19
23	have been running for [adj] years	18
24	have been know for [adj] years	16
25	have been known for [adj] years	16
26	have been use for [adj] years	13
27	have been [verb] for five years	13
28	have been [verb] for five years	13
29	have been [verb] for seven years	12
30	have been used for [adj] years	12