SN4 ""

No	Pattern	Freq
1	[conj] it [vb past] and	162
2	[subord] it [vb past] and	125
3	[adv] it [vb past] and	69
4	[noun] it [vb past] and	53
5	[verb] it [vb past] and	42
6	as it [vb past] and	41
7	as it [vb past] and	41
8	[adv] it [vb past] and	40
9	[noun sg] it [vb past] and	36
10	[Wh adv] it [vb past] and	29
11	[coord] it [vb past] and	27
12	when it [vb past] and	24
13	[pron] it [vb past] and	24
14	when it [vb past] and	24
15	[Wh det] it [vb past] and	21
16	then it [vb past] and	20
17	then it [vb past] and	20
18	how it [vb past] and	17
19	how it [vb past] and	17
20	and it [vb past] and	16
21	and it [vb past] and	16
22	[noun pl] it [vb past] and	15
23	until it [vb past] and	14
24	until it [vb past] and	14
25	before it [vb past] and	13
26	before it [vb past] and	13
27	which it [vb past] and	12
28	which it [vb past] and	12
29	but it [vb past] and	11
30	but it [vb past] and	11