SN4 ""

No	Pattern	Freq
1	[pron] had been [verb] to be	49
2	[noun] had been [verb] to be	36
3	who had been [verb] to be	21
4	who had been [verb] to be	21
5	[Wh pn] had been [verb] to be	21
6	[noun sg] had been [verb] to be	18
7	[pers pn] had been [verb] to be	18
8	[noun prp] had been [verb] to be	10
9	[Wh det] had been [verb] to be	9
10	which had been [verb] to be	7
11	it had been [verb] to be	7
12	it had been [verb] to be	7
13	[noun pl] had been [verb] to be	7
14	which had been [verb] to be	7
15	he had been [verb] to be	6
16	[conj] had been [verb] to be	6
17	he had been [verb] to be	6
18	[that] had been [verb] to be	5
19	that had been [verb] to be	5
20	that had been [verb] to be	5
21	[adj] had been [verb] to be	5
22	had [adv] been [verb] to be	26
23	had [adv] been [verb] to be	19
24	had [not/n't] been [verb] to be	7
25	had not been [verb] to be	7
26	had not been [verb] to be	6
27	had been [verb] [adv] to be	12
28	had been [verb] [adv prt] to be	7
29	had been [verb] to be [verb]	25
30	had been [verb] to be [adj]	25