SN4 ""

No	Pattern	Freq
1	have [adv] been [vb pp] to	986
2	have [adv] been [verb] to	870
3	has [adv] been [verb] to	448
4	had [adv] been [verb] to	293
5	have [adv] been [verb] to	241
6	have not been [verb] to	186
7	have [not/n't] been [verb] to	186
8	have not been [verb] to	151
9	have already been [verb] to	139
10	have already been [verb] to	139
11	have now been [verb] to	112
12	have now been [verb] to	112
13	have also been [verb] to	88
14	have also been [verb] to	88
15	have [adv] been [v-ing] to	69
16	have recently been [verb] to	59
17	have recently been [verb] to	59
18	have just been [verb] to	50
19	have just been [verb] to	50
20	have [adv] been refer to	46
21	have [adv] been referred to	44
22	have never been [verb] to	42
23	have never been [verb] to	42
24	have [adv] been shown to	41
25	have [adv] been show to	41
26	have [adv] been made to	38
27	have [adv] been make to	38
28	have previously been [verb] to	36
29	have previously been [verb] to	36
30	have n't been [verb] to	35