SN4 ""

No	Pattern	Freq
1	[noun sg] it is [adj] that	325
2	[noun pl] it is [adj] that	127
3	[noun] it is clear that	101
4	[noun] it is likely that	57
5	[noun] it is important that	42
6	[noun] it is essential that	39
7	[noun] it is possible that	34
8	[noun] it is unlikely that	26
9	case it is [adj] that	25
10	[noun prp] it is [adj] that	20
11	[noun] it is probable that	16
12	[noun] it is evident that	13
13	course it is [adj] that	13
14	[noun] it is inevitable that	13
15	case it is [adj] that	13
16	course it is [adj] that	13
17	cases it is [adj] that	12
18	[noun] it is apparent that	12
19	[noun] it is necessary that	11
20	[noun] it is obvious that	10
21	[noun] it is vital that	9
22	time it is [adj] that	9
23	time it is [adj] that	9
24	[noun] it is true that	9
25	system it is [adj] that	8
26	context it is [adj] that	7
27	view it is [adj] that	7
28	view it is [adj] that	7
29	context it is [adj] that	7
30	[noun] it is significant that	7