SN4 ""

No	Pattern	Freq
1	have [adv] been a	1707
2	have [adv] been a	1623
3	has [adv] been a	882
4	had [adv] been a	718
5	have always been a	515
6	have always been a	515
7	have not been a	340
8	have [not/n't] been a	340
9	have [adv] been an	256
10	have not been a	216
11	have never been a	203
12	have never been a	203
13	have also been a	168
14	have also been a	168
15	's [adv] been a	143
16	have n't been a	124
17	have long been a	123
18	have long been a	123
19	have [adv] been a	122
20	have once been a	92
21	have once been a	92
22	've [adv] been a	62
23	have only been a	43
24	have only been a	43
25	have all been a	35
26	have previously been a	35
27	have previously been a	35
28	have all been a	35
29	have already been a	34
30	have already been a	34