SN4 ""

No	Pattern	Freq
1	[noun] [conj] it [is] that	5
2	[conj] [pron] it [is] that	17
3	[conj] [Wh det] it [is] that	16
4	[conj] [adv] it [is] that	10
5	[conj] whatever it [is] that	9
6	[conj] whatever it [is] that	9
7	[conj] what it [is] that	7
8	[conj] what it [is] that	7
9	[conj] [adv] it [is] that	6
10	[conj] it [is] [adj] that	1761
11	[conj] it [is] [adj] that	1723
12	[conj] it [is] [verb] that	969
13	[conj] it [is] [vb pp] that	941
14	[conj] it [is] clear that	233
15	[conj] it [is] clear that	233
16	[conj] it [is] possible that	181
17	[conj] it [is] possible that	181
18	[conj] it [is] true that	179
19	[conj] it [is] true that	179
20	[conj] it [is] likely that	162
21	[conj] it [is] likely that	162
22	[conj] it [is] important that	130
23	[conj] it [is] important that	130
24	[conj] it [is] unlikely that	120
25	[conj] it [is] unlikely that	120
26	[conj] it [is] [pron] that	108
27	[conj] it [is] [adv] that	105
28	[conj] it [is] [indef pn] that	94
29	[conj] it [is] [adv] that	90
30	[conj] it [is] hope that	82