SN4 ""

No	Pattern	Freq
1	it is [adv] [verb] that the	341
2	it is [adv] [vb pp] that the	331
3	it is generally [verb] that the	49
4	it is also [verb] that the	38
5	it is often [verb] that the	37
6	it is [adv] know that the	35
7	it is [adv] known that the	35
8	it is now [verb] that the	34
9	it is well [verb] that the	32
10	it is widely [verb] that the	31
11	it is [adv] assumed that the	30
12	it is [adv] assume that the	30
13	it is sometimes [verb] that the	26
14	it is [adv] say that the	24
15	it is [adv] said that the	23
16	it is [adv] accept that the	22
17	it is [adv] accepted that the	22
18	it is [adv] believed that the	21
19	it is [adv] believe that the	21
20	it is [adv] argued that the	20
21	it is [adv] argue that the	20
22	it is [adv] suggest that the	19
23	it is [adv] suggested that the	19
24	it is [adv] recognise that the	15
25	it is [adv] recognised that the	14
26	it is [adv] agree that the	13
27	it is [adv] agreed that the	13
28	it is therefore [verb] that the	12
29	it is [adv] thought that the	11
30	it is [adv] think that the	11