SN4 ""

No	Pattern	Freq
1	have been [vb pp] for [det]	95
2	have been [vb pp] for [adj]	86
3	have been [vb pp] for [num]	37
4	have been [vb pp] for many	19
5	have been [vb pp] for many	19
6	have been [vb pp] for this	18
7	have been [vb pp] for this	18
8	have been [vb pp] for some	17
9	have been [vb pp] for some	17
10	have been used for [adj]	15
11	have been known for [adj]	11
12	have been developed for [adj]	11
13	have been made for [adj]	10
14	have been [vb pp] for two	9
15	have been [vb pp] for two	9
16	have been [vb pp] for [num ord]	7
17	have been [vb pp] for all	6
18	have been [vb pp] for all	6
19	have been [vb pp] for several	6
20	have been [vb pp] for several	6
21	have been [vb pp] for each	5
22	have been [vb pp] for three	5
23	have been designed for [adj]	5
24	have been [vb pp] for three	5
25	have been [vb pp] for each	5
26	have been [vb pp] for these	5
27	have been [vb pp] for these	5
28	have been [vb pp] for [adj -er]	5