SN4 ""

No	Pattern	Freq
1	[conj] it [vb past] for	150
2	[subord] it [vb past] for	95
3	[noun] it [vb past] for	65
4	[noun sg] it [vb past] for	45
5	as it [vb past] for	36
6	as it [vb past] for	36
7	[verb] it [vb past] for	32
8	[that] it [vb past] for	31
9	that it [vb past] for	31
10	that it [vb past] for	31
11	[pron] it [vb past] for	26
12	[Wh det] it [vb past] for	24
13	[coord] it [vb past] for	24
14	[adv] it [vb past] for	22
15	[adj] it [vb past] for	19
16	and it [vb past] for	16
17	and it [vb past] for	16
18	what it [vb past] for	15
19	what it [vb past] for	15
20	[adv] it [vb past] for	12
21	[noun pl] it [vb past] for	11
22	because it [vb past] for	10
23	because it [vb past] for	10
24	than it [vb past] for	9
25	than it [vb past] for	9
26	when it [vb past] for	9
27	when it [vb past] for	9
28	which it [vb past] for	8
29	[prep] it [vb past] for	8
30	where it [vb past] for	8