SN4 ""

No	Pattern	Freq
1	[verb] been [prep] [det] years	35
2	have been [prep] [det] years	35
3	[vb -s] been [prep] [det] years	18
4	has been [prep] [det] years	17
5	[vb past] been [prep] [det] years	10
6	had been [prep] [det] years	10
7	[vb base] been [prep] [det] years	5
8	have been [prep] [det] years	5
9	been [verb] [prep] [det] years	128
10	been [vb pp] [prep] [det] years	91
11	been [adj] [prep] [det] years	43
12	been [adj] [prep] [det] years	43
13	been [v-ing] [prep] [det] years	37
14	been know [prep] [det] years	15
15	been known [prep] [det] years	15
16	been used [prep] [det] years	14
17	been use [prep] [det] years	14
18	been [adv] [prep] [det] years	14
19	been [adv prt] [prep] [det] years	9
20	been around [prep] [det] years	9
21	been around [prep] [det] years	9
22	been empty [prep] [det] years	6
23	been empty [prep] [det] years	6
24	been [adv] [prep] [det] years	5
25	been establish [prep] [det] years	5
26	been [noun] [prep] [det] years	5
27	been established [prep] [det] years	5
28	been [prep] [det] years [art]	9
29	been [prep] [det] years [art]	9
30	been [prep] [det] years a	5