SN4 ""

No	Pattern	Freq
1	[conj] it have been [vb pp] [det]	16
2	[noun] it have been [vb pp] [det]	9
3	[subord] it have been [vb pp] [det]	8
4	[coord] it have been [vb pp] [det]	6
5	[noun sg] it have been [vb pp] [det]	5
6	[verb] it have been [vb pp] [det]	5
7	it [modal v] have been [vb pp] [det]	5
8	it [vb mod] have been [vb pp] [det]	5
9	it have [adv] been [vb pp] [det]	19
10	it have [adv] been [vb pp] [det]	18
11	it have been [vb pp] [conj] [det]	159
12	it have been [vb pp] that [det]	151
13	it have been [vb pp] that [det]	151
14	it have been [vb pp] [that] [det]	151
15	it have been [vb pp] [prep] [det]	135
16	it have been [vb pp] [prep] [det]	135
17	it have been [vb pp] by [det]	32
18	it have been [vb pp] by [det]	32
19	it have been [vb pp] for [det]	29
20	it have been [vb pp] for [det]	29
21	it have been [vb pp] [adv] [det]	20
22	it have been [vb pp] in [det]	20
23	it have been [vb pp] in [det]	20
24	it have been [vb pp] [adv] [det]	17
25	it have been [vb pp] at [det]	11
26	it have been [vb pp] at [det]	11
27	it have been [vb pp] on [det]	8
28	it have been [vb pp] on [det]	8
29	it have been [vb pp] [to-vb] [det]	7
30	it have been [vb pp] [verb] [det]	7