SN4 ""

No	Pattern	Freq
1	it is [vb pp] [adj] that [noun]	8
2	it is [vb pp] [adj] that [noun]	8
3	it is [vb pp] [adv] that [noun]	8
4	it is [vb pp] [adv] that [noun]	6
5	[conj] it is [vb pp] that [noun]	120
6	[subord] it is [vb pp] that [noun]	67
7	[coord] it is [vb pp] that [noun]	48
8	and it is [vb pp] that [noun]	31
9	and it is [vb pp] that [noun]	31
10	[adv] it is [vb pp] that [noun]	24
11	[noun] it is [vb pp] that [noun]	24
12	if it is [vb pp] that [noun]	22
13	if it is [vb pp] that [noun]	22
14	[adv] it is [vb pp] that [noun]	16
15	but it is [vb pp] that [noun]	15
16	but it is [vb pp] that [noun]	15
17	[noun sg] it is [vb pp] that [noun]	13
18	when it is [vb pp] that [noun]	12
19	when it is [vb pp] that [noun]	12
20	[pron] it is [vb pp] that [noun]	9
21	which it is [vb pp] that [noun]	8
22	[Wh det] it is [vb pp] that [noun]	8
23	[Wh adv] it is [vb pp] that [noun]	8
24	which it is [vb pp] that [noun]	8
25	where it is [vb pp] that [noun]	7
26	although it is [vb pp] that [noun]	7
27	[verb] it is [vb pp] that [noun]	7
28	where it is [vb pp] that [noun]	7
29	although it is [vb pp] that [noun]	7
30	[adj] it is [vb pp] that [noun]	6