SN4 ""

No	Pattern	Freq
1	before it [verb]	1094
2	before it [vb -s]	556
3	before it [vb past]	535
4	before it get	114
5	before it have	104
6	before it gets	73
7	before it become	72
8	before it had	60
9	before it reach	58
10	before it go	56
11	before it became	42
12	before it got	41
13	before it come	41
14	before it start	39
15	before it goes	36
16	before it reaches	36
17	before it has	36
18	before it becomes	30
19	before it starts	25
20	before it came	23
21	before it begin	23
22	before it reached	22
23	before it do	21
24	before it happen	21
25	before it went	20
26	before it leave	19
27	before it comes	17
28	before it take	16
29	before it began	15
30	before it stop	14