SN4 ""

No	Pattern	Freq
1	[noun pl] have been	14811
2	[noun pl] had been	7337
3	[noun pl] has been	2767
4	years have been	358
5	men have been	213
6	children have been	207
7	women have been	199
8	[noun pl] having been	174
9	others have been	159
10	police have been	147
11	changes have been	140
12	studies have been	140
13	things have been	136
14	companies have been	128
15	attempts have been	123
16	results have been	122
17	officers have been	114
18	areas have been	103
19	workers have been	101
20	members have been	100
21	authorities have been	100
22	houses have been	97
23	patients have been	97
24	[noun pl] to have been	94
25	services have been	89
26	systems have been	89
27	plans have been	88
28	jobs have been	85
29	problems have been	84
30	cases have been	84