SN4 ""

No	Pattern	Freq
1	it have [verb]	14685
2	it have [vb pp]	13932
3	it has [verb]	5235
4	it had [verb]	4638
5	it 's [verb]	4598
6	it have get	2055
7	it have got	2041
8	it have become	779
9	it have become	775
10	it have go	738
11	it have [to-vb]	728
12	it have gone	697
13	it have take	524
14	it have taken	505
15	it have do	494
16	it have come	444
17	it have come	418
18	it have done	397
19	it have happen	341
20	it have happened	321
21	it have have	313
22	it have make	305
23	it have made	291
24	it have had	267
25	it have give	153
26	it have given	149
27	it have prove	139
28	it have proved	132
29	it have seem	125
30	it have seemed	123