SN4 ""

No	Pattern	Freq
1	has [adv] been [vb pp] in	579
2	has [adv] been [verb] in	469
3	has already been [verb] in	133
4	has already been [verb] in	133
5	has not been [verb] in	116
6	has [not/n't] been [verb] in	116
7	has not been [verb] in	106
8	has also been [verb] in	83
9	has also been [verb] in	83
10	has now been [verb] in	33
11	has now been [verb] in	33
12	has [adv] been find in	27
13	has [adv] been found in	27
14	has recently been [verb] in	26
15	has [adv] been seen in	26
16	has recently been [verb] in	26
17	has [adv] been see in	26
18	has never been [verb] in	25
19	has never been [verb] in	25
20	has [adv] been used in	20
21	has [adv] been use in	20
22	has [adv] been discuss in	16
23	has [adv] been discussed in	16
24	has long been [verb] in	16
25	has [adv] been reported in	16
26	has long been [verb] in	16
27	has [adv] been report in	16
28	has since been [verb] in	15
29	has only been [verb] in	15
30	has [adv] been include in	15