SN4 ""

No	Pattern	Freq
1	it [be] [adj] that the [adj]	579
2	it be [adj] that the [adj]	579
3	it [is] [adj] that the [adj]	491
4	it is [adj] that the [adj]	467
5	it [be] clear that the [adj]	109
6	it [was/were] [adj] that the [adj]	87
7	it was [adj] that the [adj]	86
8	it [be] possible that the [adj]	55
9	it [be] likely that the [adj]	51
10	it [be] true that the [adj]	46
11	it [be] evident that the [adj]	32
12	it [be] important that the [adj]	31
13	it 's [adj] that the [adj]	24
14	it [be] obvious that the [adj]	22
15	it [be] essential that the [adj]	18
16	it [be] unlikely that the [adj]	18
17	it [be] probable that the [adj]	16
18	it [be] [adj] that the new	15
19	it [be] significant that the [adj]	14
20	it [be] arguable that the [adj]	12
21	it [be] vital that the [adj]	12
22	it [be] [adj] that the labour	11
23	it [be] [adj] that the present	11
24	it [be] [adj] that the british	10
25	it [be] interesting that the [adj]	10
26	it [be] [adj] that the whole	9
27	it [be] apparent that the [adj]	9
28	it [be] [adj] that the hon.	8
29	it [be] [adj] that the main	8
30	it [be] [adj] that the great	7