SN4 ""

No	Pattern	Freq
1	it all [verb]	1694
2	it [det] [vb past]	718
3	it [det] [vb -s]	595
4	it [det] [vb pp]	169
5	it [det] come	168
6	it [det] depend	162
7	it [det] depends	150
8	it [det] seem	139
9	it [det] go	131
10	it [det] [vb base]	112
11	it [det] happen	101
12	it [det] [vb infin]	94
13	it [det] start	89
14	it [det] begin	80
15	it [det] seemed	79
16	it [det] came	79
17	it [det] comes	72
18	it [det] started	68
19	it [det] happened	67
20	it [det] began	65
21	it [det] went	59
22	it [det] look	59
23	it [det] work	53
24	it [det] seems	51
25	it [det] add	50
26	it [det] goes	47
27	it [det] do	42
28	it [det] get	35
29	it [det] make	35
30	it [det] adds	34