SN4 ""

No	Pattern	Freq
1	it become [adj]	1385
2	it became [adj]	859
3	it becomes [adj]	472
4	it become clear	385
5	it become apparent	165
6	it become possible	90
7	it become obvious	85
8	it become necessary	63
9	it become evident	60
10	it become difficult	33
11	it become available	26
12	it become impossible	23
13	it become [adj]	21
14	it become important	17
15	it become common	14
16	it become fashionable	13
17	it to become [adj]	13
18	it become [adj]	12
19	it becoming [adj]	8
20	it become hard	7
21	it become illegal	7
22	it become plain	6
23	it become independent	6
24	it become essential	5
25	it become stuck	5
26	it become insolvent	5
27	it become effective	5
28	it become public	5
29	it become inevitable	5