SN4 ""

No	Pattern	Freq
1	it is [adv] [adv] [verb] that	128
2	it is [adv] [adv] [vb pp] that	112
3	it is now [adv] [verb] that	64
4	it is [adv] [adv] accepted that	34
5	it is [adv] [adv] accept that	34
6	it is [adv] generally [verb] that	33
7	it is [adv] widely [verb] that	24
8	it is [adv] well [verb] that	19
9	it is also [adv] [verb] that	14
10	it is [adv] [adv] know that	10
11	it is [adv] [adv] known that	10
12	it is [adv] [adv] establish that	9
13	it is [adv] [adv] established that	9
14	it is [adv] [adv] agree that	8
15	it is [adv] [adv] agreed that	8
16	it is [adv] [adv] recognize that	7
17	it is [adv] [adv] recognized that	7
18	it is [adv] [adv] [vb base] that	7
19	it is [adv] [adv] clear that	6
20	it is [adv] [adv] hold that	6
21	it is [adv] [adv] clear that	6
22	it is [adv] [adv] held that	6
23	it is so [adv] [verb] that	5
24	it is therefore [adv] [verb] that	5
25	it is [adv] [adv] [to-vb] that	5
26	it is still [adv] [verb] that	5