SN4 ""

No	Pattern	Freq
1	have been [vb pp] in a	827
2	[verb] been [vb pp] in a	827
3	[vb past] been [vb pp] in a	274
4	[vb -s] been [vb pp] in a	271
5	has been [vb pp] in a	267
6	had been [vb pp] in a	258
7	[vb base] been [vb pp] in a	196
8	have been [vb pp] in a	188
9	[adv] been [vb pp] in a	105
10	[adv] been [vb pp] in a	95
11	[vb infin] been [vb pp] in a	55
12	have been [vb pp] in a	55
13	to have been [vb pp] in a	20
14	[to-vb] been [vb pp] in a	20
15	also been [vb pp] in a	18
16	also been [vb pp] in a	18
17	'd been [vb pp] in a	16
18	[v-ing] been [vb pp] in a	11
19	having been [vb pp] in a	11
20	[not/n't] been [vb pp] in a	10
21	already been [vb pp] in a	10
22	already been [vb pp] in a	10
23	now been [vb pp] in a	10
24	not been [vb pp] in a	10
25	now been [vb pp] in a	10
26	previously been [vb pp] in a	9
27	previously been [vb pp] in a	9
28	not been [vb pp] in a	9
29	've been [vb pp] in a	8
30	[noun] been [vb pp] in a	7