SN4 ""

No	Pattern	Freq
1	have been [vb pp] [prep]	10199
2	have been [verb] by	2313
3	have been [verb] in	2173
4	have been [verb] to	1237
5	have been [verb] for	1168
6	have been [v-ing] [prep]	1115
7	have been [verb] with	700
8	have been [verb] on	598
9	have been [verb] from	594
10	have been make [prep]	432
11	have been made [prep]	429
12	have been [verb] at	423
13	have been [verb] into	394
14	have been [verb] as	298
15	have been find [prep]	244
16	have been found [prep]	244
17	have been use [prep]	221
18	have been used [prep]	217
19	have been [verb] of	179
20	have been [verb] about	153
21	have been develop [prep]	137
22	have been [verb] over	135
23	have been [verb] since	132
24	have been developed [prep]	132
25	have been report [prep]	114
26	have been reported [prep]	112
27	have been describe [prep]	108
28	have been described [prep]	107
29	have been take [prep]	97
30	have been put [prep]	96