SN4 ""

No	Pattern	Freq
1	[vb base] been [verb] for [adj] years	67
2	have been [verb] for [adj] years	48
3	[vb base] been [verb] for [num] years	39
4	[vb base] been [vb pp] for [adj] years	37
5	[vb base] been [v-ing] for [adj] years	30
6	[vb base] been [verb] for [det] years	28
7	've been [verb] for [adj] years	19
8	[vb base] been [verb] for many years	18
9	[vb base] been [verb] for many years	18
10	[vb base] been [verb] for two years	7
11	[vb base] been [verb] for two years	7
12	[vb base] been known for [adj] years	7
13	[vb base] been know for [adj] years	7
14	[vb base] been [verb] for several years	7
15	[vb base] been [verb] for several years	7
16	[vb base] been go for [adj] years	6
17	[vb base] been going for [adj] years	5