SN4 ""

No	Pattern	Freq
1	it is [that] the [adj] [noun]	28
2	it is [that] the [adj] [noun sg]	23
3	[adv] it is [that] the [adj]	12
4	[Wh adv] it is [that] the [adj]	9
5	[adj] it is [that] the [adj]	6
6	[adj] it is [that] the [adj]	6
7	it is [adj] [that] the [adj]	570
8	it is [adj] [that] the [adj]	568
9	it is [verb] [that] the [adj]	270
10	it is [vb pp] [that] the [adj]	265
11	it is clear [that] the [adj]	92
12	it is clear [that] the [adj]	92
13	it is possible [that] the [adj]	60
14	it is possible [that] the [adj]	60
15	it is likely [that] the [adj]	60
16	it is likely [that] the [adj]	59
17	it is true [that] the [adj]	49
18	it is true [that] the [adj]	49
19	it is important [that] the [adj]	34
20	it is important [that] the [adj]	34
21	it is [adv] [that] the [adj]	29
22	it is [adv] [that] the [adj]	29
23	it is hope [that] the [adj]	27
24	it is hoped [that] the [adj]	27
25	it is evident [that] the [adj]	25
26	it is evident [that] the [adj]	25
27	it is unlikely [that] the [adj]	20
28	it is unlikely [that] the [adj]	20
29	it is probable [that] the [adj]	19
30	it is thought [that] the [adj]	19