SN4 ""

No	Pattern	Freq
1	had [adv] been [noun]	255
2	had [adv] been [noun]	201
3	had not been [noun]	54
4	had [not/n't] been [noun]	54
5	had once been [noun]	38
6	had once been [noun]	38
7	had not been [noun]	37
8	had always been [noun]	30
9	had always been [noun]	30
10	had [pron] been [noun]	29
11	had also been [noun]	22
12	had also been [noun]	22
13	had [pers pn] been [noun]	19
14	had n't been [noun]	17
15	had previously been [noun]	15
16	had already been [noun]	15
17	had already been [noun]	15
18	had previously been [noun]	15
19	had it been [noun]	12
20	had all been [noun]	12
21	had all been [noun]	12
22	had it been [noun]	12
23	had never been [noun]	10
24	had never been [noun]	10
25	had there been [noun]	9
26	had only been [noun]	9
27	had [ex0] been [noun]	9
28	had there been [noun]	9
29	had long been [noun]	9
30	had only been [noun]	9