SN4 ""

No	Pattern	Freq
1	had [adv] been [vb pp] for	217
2	had [adv] been [verb] for	157
3	had [not/n't] been [verb] for	104
4	had not been [verb] for	104
5	had not been [verb] for	80
6	had already been [verb] for	42
7	had already been [verb] for	42
8	had [adv] been [v-ing] for	42
9	had n't been [verb] for	24
10	had [adv] been used for	13
11	had [adv] been use for	13
12	had never been [verb] for	12
13	had originally been [verb] for	12
14	had never been [verb] for	12
15	had [adv] been prepare for	12
16	had originally been [verb] for	12
17	had [adv] been prepared for	12
18	had [adv] been see for	10
19	had [adv] been seen for	10
20	had also been [verb] for	7
21	had also been [verb] for	7
22	had [adv] been paid for	7
23	had [adv] been pay for	7
24	had just been [verb] for	6
25	had just been [verb] for	6
26	had [adv] been choose for	5
27	had [adv] been work for	5
28	had [adv] been make for	5
29	had [adv] been open for	5
30	had previously been [verb] for	5