SN4 ""

No	Pattern	Freq
1	[conj] it is [adv] [verb] that	213
2	[conj] it is [adv] [verb] that	213
3	[conj] it is [adv] [vb pp] that	203
4	[conj] it is [adv] [verb] that	190
5	[coord] it is [adv] [verb] that	115
6	[subord] it is [adv] [verb] that	85
7	and it is [adv] [verb] that	66
8	and it is [adv] [verb] that	66
9	but it is [adv] [verb] that	49
10	but it is [adv] [verb] that	49
11	[conj] it is generally [verb] that	37
12	[conj] it is generally [verb] that	37
13	[conj] it is now [verb] that	29
14	[conj] it is now [verb] that	29
15	[conj] it is [adv] known that	29
16	[conj] it is [adv] know that	29
17	[conj] it is not [verb] that	23
18	[conj] it is [not/n't] [verb] that	23
19	[conj] it is not [verb] that	23
20	[conj] it is well [verb] that	22
21	[conj] it is well [verb] that	22
22	although it is [adv] [verb] that	21
23	although it is [adv] [verb] that	21
24	[conj] it is [adv] accept that	18
25	[conj] it is [adv] accepted that	18
26	[conj] it is [adv] recognised that	16
27	[conj] it is [adv] recognise that	16
28	[conj] it is [adv] assumed that	15
29	[conj] it is [adv] assume that	15
30	[conj] it is often [verb] that	14