SN4 ""

No	Pattern	Freq
1	it is [adv] [vb pp] that	1169
2	it is generally [vb pp] that	162
3	it is well [vb pp] that	160
4	it is often [vb pp] that	150
5	it is [adv] known that	147
6	it is [adv] assumed that	109
7	it is also [vb pp] that	108
8	it is now [vb pp] that	102
9	it is [adv] said that	98
10	it is sometimes [vb pp] that	95
11	it is widely [vb pp] that	88
12	it is [adv] accepted that	88
13	it is [adv] argued that	73
14	it is [adv] believed that	56
15	it is [adv] suggested that	53
16	it is [adv] recognised that	49
17	it is [adv] agreed that	41
18	it is [adv] thought that	36
19	it is [adv] established that	36
20	it is commonly [vb pp] that	31
21	it is [adv] recommended that	30
22	it is strongly [vb pp] that	28
23	it is [adv] claimed that	27
24	it is usually [vb pp] that	25
25	it is therefore [vb pp] that	23
26	it is [adv] recognized that	20
27	it is further [vb pp] that	17
28	it is [adv] found that	16
29	it is frequently [vb pp] that	16
30	it is [adv] acknowledged that	14