SN4 ""

No	Pattern	Freq
1	it [verb] [adv] been the [noun]	81
2	it have [adv] been the [noun]	81
3	it [verb] [adv] been the [noun sg]	74
4	it [verb] [adv] been the [noun]	73
5	it [vb -s] [adv] been the [noun]	56
6	it has [adv] been the [noun]	43
7	it had [adv] been the [noun]	25
8	it [vb past] [adv] been the [noun]	25
9	it [verb] always been the [noun]	21
10	it [verb] always been the [noun]	21
11	it [verb] [adv] been the case	13
12	it 's [adv] been the [noun]	13
13	it [verb] [adv] been the case	13
14	it [verb] never been the [noun]	12
15	it [verb] never been the [noun]	12
16	it [verb] long been the [noun]	10
17	it [verb] long been the [noun]	10
18	it [verb] not been the [noun]	8
19	it [verb] not been the [noun]	8
20	it [verb] [not/n't] been the [noun]	8
21	it [verb] also been the [noun]	7
22	it [verb] also been the [noun]	7
23	it [verb] [adv] been the practice	7
24	it [verb] [adv] been the practice	7
25	it [verb] [adv] been the [noun pl]	6
26	it [verb] [adv] been the subject	6
27	it [verb] [adv] been the subject	6
28	it [verb] once been the [noun]	5
29	it [verb] [adv] been the intention	5
30	it [verb] once been the [noun]	5