SN4 ""

No	Pattern	Freq
1	that had [adv] been	295
2	that had [adv] been	211
3	that had not been	84
4	that had [not/n't] been	84
5	that had not been	54
6	that had once been	49
7	that had once been	49
8	that had already been	31
9	that had already been	31
10	that had n't been	30
11	that had previously been	23
12	that had previously been	23
13	that had never been	20
14	that had never been	20
15	that had always been	18
16	that had always been	18
17	that had [pron] been	17
18	that had [pers pn] been	12
19	that had long been	7
20	that had ever been	7
21	that had ever been	7
22	that had long been	7
23	that had just been	6
24	that had just been	6
25	that had hitherto been	5
26	that had it been	5
27	that had hitherto been	5
28	that had it been	5
29	[noun] that had been	1109
30	[noun sg] that had been	692