SN4 ""

No	Pattern	Freq
1	have previously been [vb pp] [prep]	159
2	had previously been [verb] [prep]	92
3	has previously been [verb] [prep]	44
4	have previously been [verb] to	36
5	have previously been [verb] in	31
6	have previously been [verb] by	27
7	have previously been [verb] [prep]	24
8	have previously been [verb] as	13
9	have previously been [verb] from	11
10	have previously been [verb] with	10
11	have previously been show [prep]	9
12	have previously been shown [prep]	9
13	have previously been [verb] for	8
14	have previously been [verb] on	7
15	have previously been [v-ing] [prep]	6
16	have previously been hold [prep]	5
17	have previously been used [prep]	5
18	have previously been [verb] at	5
19	have previously been reported [prep]	5
20	have previously been held [prep]	5
21	have previously been report [prep]	5
22	have previously been use [prep]	5