SN4 ""

No	Pattern	Freq
1	have become a [adj]	585
2	has become a [adj]	302
3	had become a [adj]	211
4	have become a [adj]	51
5	have become a major	50
6	have become a major	50
7	have become a regular	16
8	have become a regular	16
9	have become a political	14
10	have become a political	14
11	have become a [adj]	14
12	have become a popular	13
13	to have become a [adj]	13
14	have become a popular	13
15	have become a central	11
16	have become a central	11
17	have become a national	11
18	have become a national	11
19	have become a [adj -er]	9
20	have become a real	9
21	have become a real	9
22	have become a familiar	8
23	have become a familiar	8
24	have become a big	8
25	have become a big	8
26	have become a key	8
27	have become a key	8
28	have become a significant	7
29	have become a powerful	7
30	have become a significant	7