SN4 ""

No	Pattern	Freq
1	[noun] it is [adj] [verb] that	128
2	[noun] it is [adj] [verb] that	124
3	[noun] it is [adv] [verb] that	49
4	[noun] it is [adv] [verb] that	47
5	[noun] it is important [verb] that	20
6	[noun] it is important [verb] that	20
7	[noun] it is worth [verb] that	16
8	[noun] it is [prep] [verb] that	16
9	[noun] it is worth [verb] that	16
10	[noun] it is [prep] [verb] that	16
11	[noun] it is possible [verb] that	15
12	[noun] it is possible [verb] that	15
13	[noun] it is easy [verb] that	13
14	[noun] it is easy [verb] that	13
15	[noun] it is sufficient [verb] that	11
16	[noun] it is sufficient [verb] that	11
17	[noun] it is reasonable [verb] that	8
18	[noun] it is reasonable [verb] that	8
19	[noun] it is interesting [verb] that	7
20	[noun] it is necessary [verb] that	7
21	[noun] it is difficult [verb] that	7
22	[noun] it is difficult [verb] that	7
23	[noun] it is interesting [verb] that	7
24	[noun] it is necessary [verb] that	7
25	[noun] it is often [verb] that	6
26	[noun] it is generally [verb] that	6
27	[noun] it is well [verb] that	6
28	[noun] it is generally [verb] that	6
29	[noun] it is often [verb] that	6
30	[noun] it is now [verb] that	6