SN4 ""

No	Pattern	Freq
1	it is [adv] [verb] that [art]	414
2	it is [adv] [verb] that [art]	414
3	it is [adv] [vb pp] that [art]	404
4	it is [adv] [verb] that the	341
5	it is [adv] [verb] that the	341
6	it is [adv] [verb] that a	68
7	it is generally [verb] that [art]	60
8	it is [adv] [verb] that a	59
9	it is also [verb] that [art]	48
10	it is often [verb] that [art]	44
11	it is [adv] known that [art]	41
12	it is well [verb] that [art]	41
13	it is [adv] know that [art]	41
14	it is now [verb] that [art]	40
15	it is [adv] assume that [art]	36
16	it is [adv] assumed that [art]	36
17	it is widely [verb] that [art]	34
18	it is sometimes [verb] that [art]	32
19	it is [adv] accept that [art]	29
20	it is [adv] accepted that [art]	29
21	it is [adv] say that [art]	28
22	it is [adv] argue that [art]	27
23	it is [adv] said that [art]	27
24	it is [adv] argued that [art]	27
25	it is [adv] suggest that [art]	24
26	it is [adv] suggested that [art]	24
27	it is [adv] believed that [art]	22
28	it is [adv] believe that [art]	22
29	it is [adv] recognise that [art]	16
30	it is [adv] agree that [art]	16