SN4 ""

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