SN4 ""

No	Pattern	Freq
1	it is [adv] [vb pp] [that] the	331
2	it is [adv] [vb pp] that the	331
3	it is [adv] [vb pp] [that] the	331
4	it is generally [vb pp] [that] the	49
5	it is also [vb pp] [that] the	38
6	it is often [vb pp] [that] the	37
7	it is [adv] known [that] the	35
8	it is now [vb pp] [that] the	34
9	it is well [vb pp] [that] the	32
10	it is widely [vb pp] [that] the	31
11	it is [adv] assumed [that] the	30
12	it is sometimes [vb pp] [that] the	26
13	it is [adv] said [that] the	23
14	it is [adv] accepted [that] the	22
15	it is [adv] believed [that] the	21
16	it is [adv] argued [that] the	20
17	it is [adv] suggested [that] the	19
18	it is [adv] recognised [that] the	14
19	it is [adv] agreed [that] the	13
20	it is therefore [vb pp] [that] the	12
21	it is [adv] recommended [that] the	11
22	it is [adv] thought [that] the	11
23	it is usually [vb pp] [that] the	9
24	it is [adv] established [that] the	8
25	it is frequently [vb pp] [that] the	7
26	it is commonly [vb pp] [that] the	7
27	it is [adv] hoped [that] the	7
28	it is [adv] felt [that] the	7
29	it is [adv] held [that] the	6
30	it is [adv] proposed [that] the	6