SN4 ""

No	Pattern	Freq
1	have never been [det]	92
2	has [adv] been [det]	90
3	had [adv] been [det]	85
4	have [adv] been any	60
5	have [adv] been some	57
6	have [adv] been [det]	49
7	have always been [det]	48
8	have [adv] been such	32
9	's [adv] been [det]	29
10	have [adv] been that	26
11	have [adv] been much	24
12	have there been [det]	20
13	have also been [det]	17
14	have already been [det]	17
15	have [adv] been this	14
16	've [adv] been [det]	13
17	have ever been [det]	9
18	have [adv] been many	9
19	have [adv] been another	8
20	have [adv] been several	8
21	have [adv] been more	8
22	have [adv] been enough	7
23	have [adv] been those	6
24	have recently been [det]	5
25	have probably been [det]	5