SN4 ""

No	Pattern	Freq
1	has [adv] been a	616
2	had [adv] been a	496
3	have always been a	452
4	have never been a	186
5	have also been a	151
6	's [adv] been a	128
7	have long been a	110
8	have [adv] been a	92
9	have once been a	82
10	've [adv] been a	57
11	have only been a	39
12	have all been a	31
13	have previously been a	31
14	have already been a	30
15	have just been a	24
16	have recently been a	19
17	have indeed been a	16
18	have obviously been a	16
19	have probably been a	16
20	have certainly been a	14
21	'd [adv] been a	13
22	have ever been a	13
23	have [adv] been a	11
24	have even been a	10
25	have traditionally been a	10
26	have apparently been a	9
27	have originally been a	9
28	have often been a	9
29	have really been a	8
30	having [adv] been a	8