SN4 ""

No	Pattern	Freq
1	is [adj] [to-vb] that this	70
2	is important [to-vb] that [det]	58
3	is [adj] to note that [det]	36
4	is [adj] [to-vb] that such	28
5	is [adj] [to-vb] that some	27
6	is [adj] [to-vb] that these	27
7	is [adj] [to-vb] that all	26
8	is [adj] to say that [det]	23
9	is interesting [to-vb] that [det]	21
10	is [adj] to assume that [det]	21
11	is [adj] to believe that [det]	18
12	is [adj] to remember that [det]	18
13	is reasonable [to-vb] that [det]	16
14	is [adj] [to-vb] that many	15
15	is difficult [to-vb] that [det]	14
16	is easy [to-vb] that [det]	14
17	is [adj] [to-vb] that any	14
18	is fair [to-vb] that [det]	12
19	is hard [to-vb] that [det]	9
20	is [adj] to suppose that [det]	9
21	is [adj] to ensure that [det]	9
22	is likely [to-vb] that [det]	9
23	is [adj] to stress that [det]	8
24	is [adj] to think that [det]	7
25	is [adj] to recognise that [det]	6
26	is [adj] [to-vb] that that	6
27	is [adj] to see that [det]	6
28	is [adj] [to-vb] that those	6
29	is necessary [to-vb] that [det]	6
30	is [adj] [to-vb] that most	6