SN4 ""

No	Pattern	Freq
31	it is [adv] accepted that [det]	14
32	it is [adv] essential that [det]	11
33	it is [adv] essential that [det]	11
34	it is [adv] said that [det]	10
35	it is [adv] say that [det]	10
36	it is [adv] apparent that [det]	6
37	it is [adv] apparent that [det]	6
38	it is [adv] probable that [det]	6
39	it is [adv] vital that [det]	6
40	it is [adv] vital that [det]	6
41	it is [adv] probable that [det]	6
42	it is [adv] certain that [det]	5
43	it is [adv] recognised that [det]	5
44	it is [adv] recognise that [det]	5
45	it is [adv] agree that [det]	5
46	it is [adv] acknowledge that [det]	5
47	it is [adv] [v-ing] that [det]	5
48	it is [adv] significant that [det]	5
49	it is [adv] acknowledged that [det]	5
50	it is [adv] agreed that [det]	5
51	it is [adv] certain that [det]	5
52	it is [adv] significant that [det]	5
53	it is [adv] that [det] [noun]	10
54	it is [adv] that [det] [noun sg]	6