SN4 ""

No	Pattern	Freq
1	[conj] it is [adv] [vb pp] that	184
2	[coord] it is [adv] [vb pp] that	110
3	[subord] it is [adv] [vb pp] that	81
4	and it is [adv] [vb pp] that	63
5	and it is [adv] [vb pp] that	63
6	but it is [adv] [vb pp] that	47
7	but it is [adv] [vb pp] that	47
8	[conj] it is generally [vb pp] that	37
9	[conj] it is generally [vb pp] that	37
10	[conj] it is now [vb pp] that	29
11	[conj] it is now [vb pp] that	29
12	[conj] it is [adv] known that	29
13	[conj] it is well [vb pp] that	22
14	[conj] it is well [vb pp] that	22
15	[conj] it is not [vb pp] that	19
16	[conj] it is [not/n't] [vb pp] that	19
17	although it is [adv] [vb pp] that	19
18	although it is [adv] [vb pp] that	19
19	[conj] it is not [vb pp] that	19
20	[conj] it is [adv] accepted that	18
21	[conj] it is [adv] recognised that	16
22	[conj] it is [adv] assumed that	15
23	[conj] it is often [vb pp] that	14
24	[conj] it is often [vb pp] that	14
25	[conj] it is widely [vb pp] that	12
26	[that] it is [adv] [vb pp] that	12
27	[conj] it is widely [vb pp] that	12
28	that it is [adv] [vb pp] that	12
29	that it is [adv] [vb pp] that	12
30	though it is [adv] [vb pp] that	11