SN4 ""

No	Pattern	Freq
1	[conj] it is [verb] that a	66
2	[subord] it is [verb] that a	37
3	[coord] it is [verb] that a	24
4	and it is [verb] that a	17
5	and it is [verb] that a	17
6	[noun] it is [verb] that a	16
7	if it is [verb] that a	12
8	if it is [verb] that a	12
9	[noun sg] it is [verb] that a	11
10	[adv] it is [verb] that a	10
11	but it is [verb] that a	7
12	but it is [verb] that a	7
13	[adv] it is [verb] that a	6
14	because it is [verb] that a	6
15	because it is [verb] that a	6
16	[that] it is [verb] that a	5
17	[adj] it is [verb] that a	5
18	when it is [verb] that a	5
19	that it is [verb] that a	5
20	that it is [verb] that a	5
21	when it is [verb] that a	5
22	it is [adj] [verb] that a	88
23	it is [adj] [verb] that a	86
24	it is [adv] [verb] that a	72
25	it is [adv] [verb] that a	68
26	it is important [verb] that a	22
27	it is important [verb] that a	22
28	it is [prep] [verb] that a	12
29	it is [prep] [verb] that a	12
30	it is worth [verb] that a	12