SN4 ""

No	Pattern	Freq
1	have [adv] become	932
2	has [adv] become	390
3	had [adv] become	338
4	have now become	230
5	have [adv] become	179
6	have also become	109
7	have suddenly become	67
8	have already become	67
9	have recently become	47
10	have since become	42
11	have just become	36
12	have thus become	20
13	have never become	19
14	have increasingly become	19
15	've [adv] become	19
16	have therefore become	14
17	have quickly become	14
18	have only become	13
19	have almost become	10
20	have again become	10
21	have all become	9
22	have effectively become	9
23	have finally become	9
24	have indeed become	9
25	have gradually become	9
26	have then become	8
27	have subsequently become	8
28	have somehow become	7
29	have rapidly become	7
30	have actually become	6