SN4 ""

No	Pattern	Freq
1	it [verb] and	1382
2	it [vb -s] and	592
3	it [vb past] and	517
4	it [vb pp] and	74
5	it [to-vb] and	68
6	it [vb infin] and	66
7	it go and	52
8	it do and	50
9	it come and	44
10	it work and	42
11	it [v-ing] and	41
12	it happen and	26
13	it [vb base] and	24
14	it works and	21
15	it does and	20
16	it open and	19
17	it look and	19
18	it goes and	18
19	it comes and	17
20	it start and	16
21	it came and	16
22	it exist and	16
23	it going and	15
24	it happened and	15
25	it exists and	14
26	it looks and	14
27	it opened and	14
28	it stop and	14
29	it done and	13
30	it say and	13