SN4 ""

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