SN4 ""

No	Pattern	Freq
31	it is [adv] clear that [pers pn]	34
32	it is [adv] true that [pers pn]	29
33	it is [adv] true that [pers pn]	29
34	it is [adv] certain that [pers pn]	22
35	it is [adv] certain that [pers pn]	22
36	it is [adv] possible that [pers pn]	18
37	it is [adv] possible that [pers pn]	18
38	it is [adv] essential that [pers pn]	16
39	it is [adv] essential that [pers pn]	16
40	it is [adv] known that [pers pn]	13
41	it is [adv] know that [pers pn]	13
42	it is [adv] probable that [pers pn]	12
43	it is [adv] probable that [pers pn]	12
44	it is [adv] thought that [pers pn]	10
45	it is [adv] think that [pers pn]	10
46	it is [adv] say that [pers pn]	9
47	it is [adv] [noun sg] that [pers pn]	9
48	it is [adv] assumed that [pers pn]	9
49	it is [adv] [noun] that [pers pn]	9
50	it is [adv] assume that [pers pn]	9
51	it is [adv] said that [pers pn]	9
52	it is [adv] [pron] that [pers pn]	8
53	it is [adv] suggested that [pers pn]	8
54	it is [adv] suggest that [pers pn]	8
55	it is [adv] argue that [pers pn]	7
56	it is [adv] obvious that [pers pn]	7
57	it is [adv] argued that [pers pn]	7
58	it is [adv] [indef pn] that [pers pn]	7
59	it is [adv] recommend that [pers pn]	7
60	it is [adv] obvious that [pers pn]	7