SN4 ""

No	Pattern	Freq
1	have not [adv] been [vb pp] [prep]	199
2	have not yet been [verb] [prep]	105
3	has not [adv] been [verb] [prep]	88
4	had not [adv] been [verb] [prep]	57
5	have not [adv] been [verb] [prep]	56
6	have not [adv] been [verb] by	50
7	have not [adv] been [verb] in	48
8	have not [adv] been [verb] to	26
9	have not [adv] been [verb] for	19
10	have not previously been [verb] [prep]	18
11	have not always been [verb] [prep]	18
12	have not [adv] been [verb] with	16
13	have not [adv] been [verb] into	12
14	have not even been [verb] [prep]	12
15	have not already been [verb] [prep]	11
16	have not only been [verb] [prep]	7
17	have not [adv] been [verb] on	7
18	have not [adv] been [verb] from	6
19	have not really been [verb] [prep]	6
20	have not [adv] been [verb] at	6
21	have not [adv] been [v-ing] [prep]	6
22	have not [adv] been apply [prep]	5
23	have not [adv] been applied [prep]	5