SN4 ""

No	Pattern	Freq
1	have been [vb pp] [adj] years	71
2	have been [verb] [num] years	68
3	had been [verb] [adj] years	50
4	have been [verb] two years	18
5	have been [verb] two years	18
6	have been [verb] [det] years	17
7	have been [v-ing] [adj] years	14
8	has been [verb] [adj] years	11
9	have been [verb] some years	9
10	have been [verb] ten years	9
11	have been [verb] ten years	9
12	have been [verb] some years	9
13	have been [verb] [adj] years	8
14	have been [verb] [adj] years	7
15	have been born [adj] years	7
16	have been bear [adj] years	7
17	have been waiting [adj] years	5
18	have been [verb] five years	5
19	have been [verb] four years	5
20	have been [verb] five years	5
21	have been wait [adj] years	5
22	have been [verb] four years	5