SN4 ""

No	Pattern	Freq
1	[adv] it [is] that [noun]	18
2	[pron] it [is] that [noun]	17
3	[Wh det] it [is] that [noun]	16
4	what it [is] that [noun]	15
5	what it [is] that [noun]	15
6	[Wh adv] it [is] that [noun]	14
7	why it [is] that [noun]	9
8	why it [is] that [noun]	9
9	[prep] it [is] that [noun]	8
10	[prep] it [is] that [noun]	8
11	[verb] it [is] that [noun]	7
12	[noun sg] it [is] that [noun]	7
13	[noun] it [is] that [noun]	7
14	[adj] it [is] that [noun]	6
15	[adj] it [is] that [noun]	6
16	how it [is] that [noun]	5
17	[conj] it [is] that [noun]	5
18	of it [is] that [noun]	5
19	how it [is] that [noun]	5
20	of it [is] that [noun]	5
21	it [verb] [is] that [noun]	5
22	it [vb -s] [is] that [noun]	5
23	it [is] [adj] that [noun]	1450
24	it [is] [adj] that [noun]	1443
25	it [is] [verb] that [noun]	574
26	it [is] [vb pp] that [noun]	546
27	it [is] clear that [noun]	232
28	it [is] clear that [noun]	232
29	it [is] true that [noun]	153
30	it [is] true that [noun]	153