SN4 ""

No	Pattern	Freq
1	it [is] [adj] [that] the [adj]	596
2	it [is] [adj] that the [adj]	595
3	it [is] [adj] [that] the [adj]	594
4	it is [adj] [that] the [adj]	570
5	it [is] [adj] [that] the [adj]	493
6	it [is] clear [that] the [adj]	99
7	it [is] clear [that] the [adj]	99
8	it [is] possible [that] the [adj]	65
9	it [is] possible [that] the [adj]	65
10	it [is] likely [that] the [adj]	61
11	it [is] likely [that] the [adj]	60
12	it [is] true [that] the [adj]	51
13	it [is] true [that] the [adj]	51
14	it [is] important [that] the [adj]	34
15	it [is] important [that] the [adj]	34
16	it [is] [adj] [that] the [num]	31
17	it 's [adj] [that] the [adj]	26
18	it [is] evident [that] the [adj]	25
19	it [is] evident [that] the [adj]	25
20	it [is] [adj] [that] the [det]	23
21	it [is] [adj] [that] the two	21
22	it [is] unlikely [that] the [adj]	21
23	it [is] unlikely [that] the [adj]	21
24	it [is] [adj] [that] the two	21
25	it [is] probable [that] the [adj]	20
26	it [is] probable [that] the [adj]	20
27	it [is] [adj] [that] the [adj -er]	19
28	it [is] [adj] [that] the [num ord]	19
29	it [is] essential [that] the [adj]	18
30	it [is] essential [that] the [adj]	18