SN4 ""

No	Pattern	Freq
1	have been [vb pp] [prep]	10199
2	have been [vb pp] by	2308
3	have been [vb pp] by	2308
4	have been [vb pp] in	2021
5	have been [vb pp] in	2021
6	have been [vb pp] to	1154
7	have been [vb pp] to	1154
8	have been [vb pp] for	874
9	have been [vb pp] for	874
10	have been [vb pp] with	612
11	have been [vb pp] with	612
12	have been [vb pp] from	571
13	have been [vb pp] from	571
14	have been [vb pp] on	504
15	have been [vb pp] on	504
16	have been made [prep]	429
17	have been [vb pp] into	361
18	have been [vb pp] into	361
19	have been [vb pp] at	332
20	have been [vb pp] at	332
21	have been [vb pp] as	289
22	have been [vb pp] as	289
23	have been found [prep]	244
24	have been used [prep]	217
25	have been [vb pp] of	162
26	have been [vb pp] of	162
27	have been developed [prep]	132
28	have been reported [prep]	112
29	have been [vb pp] since	109
30	have been [vb pp] since	109