SN4 ""

No	Pattern	Freq
1	[conj] it [adv] occur	43
2	[coord] it [adv] occur	20
3	[verb] it [adv] occur	18
4	[subord] it [adv] occur	15
5	[noun] it [adv] occur	11
6	and it [adv] occur	11
7	and it [adv] occur	11
8	[adv] it [adv] occur	10
9	but it [adv] occur	9
10	do it [adv] occur	9
11	[noun sg] it [adv] occur	9
12	but it [adv] occur	9
13	[that] it [adv] occur	8
14	that it [adv] occur	8
15	[vb -s] it [adv] occur	8
16	that it [adv] occur	8
17	[vb past] it [adv] occur	7
18	did it [adv] occur	6
19	[adv] it [adv] occur	6
20	have it [adv] occur	5
21	it [verb] [adv] occur	192
22	it [vb past] [adv] occur	163
23	it have [adv] occur	101
24	it had [adv] occur	94
25	it do [adv] occur	90
26	it did [adv] occur	69
27	it [vb -s] [adv] occur	29
28	it [vb mod] [adv] occur	24
29	it [modal v] [adv] occur	24
30	it does [adv] occur	21