SN4 ""

No	Pattern	Freq
1	it is [adv] [adj] that [art]	755
2	it is [adv] [adj] that the	623
3	it is [adv] [adj] that the	623
4	it is [adv] [adj] that a	114
5	it is also [adj] that [art]	101
6	it is [adv] likely that [art]	94
7	it is [adv] [adj] that a	91
8	it is [adv] clear that [art]	90
9	it is quite [adj] that [art]	87
10	it is [adv] possible that [art]	86
11	it is [adv] important that [art]	71
12	it is [adv] true that [art]	67
13	it is [adv] surprising that [art]	52
14	it is very [adj] that [art]	52
15	it is hardly [adj] that [art]	45
16	it is [adv] unlikely that [art]	44
17	it is more [adj] that [art]	44
18	it is therefore [adj] that [art]	38
19	it is highly [adj] that [art]	30
20	it is now [adj] that [art]	30
21	it is certainly [adj] that [art]	25
22	it is [adv] certain that [art]	24
23	it is almost [adj] that [art]	24
24	it is perhaps [adj] that [art]	23
25	it is [adv] [adj] that an	23
26	it is most [adj] that [art]	19
27	it is equally [adj] that [art]	18
28	it is [adv] essential that [art]	16
29	it is [adv] [adj] that no	15
30	it is [adv] significant that [art]	15