SN4 ""

No	Pattern	Freq
1	it is [adv] [vb pp] that [art]	404
2	it is [adv] [vb pp] that [art]	404
3	it is [adv] [vb pp] that the	331
4	it is [adv] [vb pp] that the	331
5	it is [adv] [vb pp] that a	68
6	it is generally [vb pp] that [art]	60
7	it is [adv] [vb pp] that a	59
8	it is also [vb pp] that [art]	48
9	it is often [vb pp] that [art]	44
10	it is well [vb pp] that [art]	41
11	it is [adv] known that [art]	41
12	it is now [vb pp] that [art]	40
13	it is [adv] assumed that [art]	36
14	it is widely [vb pp] that [art]	34
15	it is sometimes [vb pp] that [art]	32
16	it is [adv] accepted that [art]	29
17	it is [adv] said that [art]	27
18	it is [adv] argued that [art]	27
19	it is [adv] suggested that [art]	24
20	it is [adv] believed that [art]	22
21	it is [adv] agreed that [art]	16
22	it is [adv] recognised that [art]	15
23	it is therefore [vb pp] that [art]	14
24	it is [adv] thought that [art]	13
25	it is [adv] established that [art]	13
26	it is [adv] recommended that [art]	13
27	it is usually [vb pp] that [art]	11
28	it is [adv] claimed that [art]	10
29	it is frequently [vb pp] that [art]	9
30	it is [adv] [vb pp] that an	9