SN4 ""

No	Pattern	Freq
1	it is [vb pp] [adv] that [adj]	9
2	it is [vb pp] [adj] that [adj]	7
3	it is [vb pp] [adj] that [adj]	7
4	[conj] it is [vb pp] that [adj]	180
5	[coord] it is [vb pp] that [adj]	89
6	[subord] it is [vb pp] that [adj]	89
7	and it is [vb pp] that [adj]	64
8	and it is [vb pp] that [adj]	64
9	[noun] it is [vb pp] that [adj]	46
10	if it is [vb pp] that [adj]	31
11	if it is [vb pp] that [adj]	31
12	[noun sg] it is [vb pp] that [adj]	27
13	but it is [vb pp] that [adj]	25
14	but it is [vb pp] that [adj]	25
15	[adv] it is [vb pp] that [adj]	21
16	[adv] it is [vb pp] that [adj]	15
17	[noun pl] it is [vb pp] that [adj]	12
18	[adj] it is [vb pp] that [adj]	10
19	[verb] it is [vb pp] that [adj]	9
20	when it is [vb pp] that [adj]	8
21	when it is [vb pp] that [adj]	8
22	although it is [vb pp] that [adj]	7
23	which it is [vb pp] that [adj]	7
24	though it is [vb pp] that [adj]	7
25	though it is [vb pp] that [adj]	7
26	where it is [vb pp] that [adj]	7
27	[Wh det] it is [vb pp] that [adj]	7
28	although it is [vb pp] that [adj]	7
29	which it is [vb pp] that [adj]	7
30	where it is [vb pp] that [adj]	7