SN4 ""

No	Pattern	Freq
1	have been [vb pp] by	2308
2	have been [vb pp] in	2021
3	have been [vb pp] to	1154
4	have been [vb pp] for	874
5	have been [vb pp] with	612
6	have been [vb pp] from	571
7	have been [vb pp] on	504
8	have been made [prep]	429
9	have been [vb pp] into	361
10	have been [vb pp] at	332
11	have been [vb pp] as	289
12	have been found [prep]	244
13	have been used [prep]	217
14	have been [vb pp] of	162
15	have been developed [prep]	132
16	have been reported [prep]	112
17	have been [vb pp] since	109
18	have been described [prep]	107
19	have been [vb pp] over	107
20	have been taken [prep]	95
21	have been put [prep]	94
22	have been identified [prep]	90
23	have been shown [prep]	87
24	have been [vb pp] about	84
25	have been replaced [prep]	83
26	have been killed [prep]	79
27	have been [vb pp] under	76
28	have been placed [prep]	72
29	have been introduced [prep]	70
30	have been charged [prep]	66