SN4 ""

No	Pattern	Freq
1	have been [vb pp] for [adj]	230
2	have been [verb] for [det]	127
3	have been [verb] for [adj]	89
4	have been [v-ing] for [adj]	66
5	have been [verb] for [num]	64
6	have been [verb] for some	31
7	have been [verb] for some	31
8	have been [verb] for this	23
9	have been [verb] for this	23
10	have been [verb] for many	22
11	have been [verb] for many	22
12	have been use for [adj]	15
13	have been used for [adj]	15
14	have been [verb] for two	13
15	have been [verb] for two	13
16	have been develop for [adj]	12
17	have been known for [adj]	11
18	have been developed for [adj]	11
19	have been know for [adj]	11
20	have been [verb] for several	10
21	have been make for [adj]	10
22	have been [verb] for several	10
23	have been made for [adj]	10
24	have been [verb] for [num ord]	8
25	have been [verb] for [adj -er]	8
26	have been wait for [adj]	7
27	have been [verb] for three	7
28	have been [verb] for all	7
29	have been [verb] for all	7
30	have been [verb] for three	7