SN4 ""

No	Pattern	Freq
1	have been [adj] [noun sg]	2000
2	have been [adj] [noun]	1783
3	have been [adj] [noun pl]	1503
4	have been [det] [noun]	1239
5	had been [adj] [noun]	941
6	have been [adj] [noun]	846
7	has been [adj] [noun]	832
8	have been [adj] [noun]	576
9	have been [num] [noun]	496
10	have been some [noun]	393
11	have been some [noun]	393
12	's been [adj] [noun]	171
13	have been [adj] year	162
14	have been [adj] years	146
15	have been many [noun]	121
16	have been many [noun]	121
17	have been any [noun]	119
18	have been any [noun]	119
19	have been little [noun]	117
20	have been little [noun]	112
21	to have been [adj] [noun]	105
22	have been much [noun]	100
23	have been much [noun]	100
24	have been considerable [noun]	94
25	have been considerable [noun]	94
26	have been [adj] change	79
27	have been several [noun]	72
28	have been several [noun]	72
29	have been that [noun]	65
30	have been that [noun]	65