SN4 ""

No	Pattern	Freq
1	has been [vb pp] in [det]	272
2	have been [vb pp] in this	202
3	have been [vb pp] in [det]	197
4	have been [vb pp] in some	119
5	had been [vb pp] in [det]	98
6	have been [vb pp] in [det]	64
7	have been [vb pp] in many	58
8	have been [vb pp] in that	47
9	have been [vb pp] in several	46
10	have been [vb pp] in any	44
11	have been [vb pp] in all	35
12	have been [vb pp] in such	28
13	have been used in [det]	26
14	have been found in [det]	25
15	have been made in [det]	24
16	to have been [vb pp] in [det]	22
17	have been [vb pp] in these	21
18	have been [vb pp] in most	20
19	have been described in [det]	17
20	have been [vb pp] in half	15
21	have been cut in [det]	14
22	have been included in [det]	13
23	have been done in [det]	12
24	having been [vb pp] in [det]	12
25	have been shown in [det]	10
26	have been developed in [det]	10
27	have been [vb pp] in another	10
28	's been [vb pp] in [det]	10
29	have been [vb pp] in each	9
30	have been studied in [det]	8