SN4 ""

No	Pattern	Freq
1	it is [adv] [adj] to say that	111
2	it is also [adj] [to-vb] that	89
3	it is [adv] important [to-vb] that	69
4	it is [adv] true [to-vb] that	53
5	it is probably [adj] [to-vb] that	47
6	it is [adv] fair [to-vb] that	39
7	it is [adv] [adj] to note that	39
8	it is very [adj] [to-vb] that	25
9	it is perhaps [adj] [to-vb] that	23
10	it is therefore [adj] [to-vb] that	22
11	it is [adv] [adj] to remember that	22
12	it is [adv] [adj] to ensure that	21
13	it is only [adj] [to-vb] that	21
14	it is [adv] [adj] to assume that	21
15	it is [adv] interesting [to-vb] that	20
16	it is [adv] possible [to-vb] that	19
17	it is [adv] [adj] to suggest that	16
18	it is [adv] reasonable [to-vb] that	15
19	it is equally [adj] [to-vb] that	14
20	it is quite [adj] [to-vb] that	14
21	it is [adv] difficult [to-vb] that	13
22	it is [adv] easy [to-vb] that	12
23	it is [adv] necessary [to-vb] that	12
24	it is [adv] [adj] to find that	11
25	it is [adv] [adj] to suppose that	11
26	it is as [adj] [to-vb] that	11
27	it is [adv] [adj] to think that	11
28	it is [adv] [adj] to believe that	11
29	it is [adv] [adj] to argue that	10
30	it is [adv] [adj] to see that	10