SN4 ""

No	Pattern	Freq
1	[subord] it is true that	128
2	[subord] it is clear that	94
3	although it is [adj] that	82
4	while it is [adj] that	79
5	if it is [adj] that	75
6	so it is [adj] that	65
7	[subord] it is likely that	45
8	though it is [adj] that	40
9	[subord] it is possible that	36
10	since it is [adj] that	33
11	[subord] it is unlikely that	31
12	where it is [adj] that	30
13	because it is [adj] that	26
14	when it is [adj] that	23
15	as it is [adj] that	23
16	[subord] it is important that	21
17	whilst it is [adj] that	18
18	[subord] it is satisfied that	18
19	[subord] it is obvious that	16
20	[subord] it is essential that	14
21	for it is [adj] that	13
22	[subord] it is apparent that	11
23	[subord] it is probable that	11
24	unless it is [adj] that	8
25	[subord] it is vital that	8
26	until it is [adj] that	7
27	[subord] it is conceivable that	7
28	[subord] it is evident that	6
29	whether it is [adj] that	5
30	[subord] it is inevitable that	5