SN4 ""

No	Pattern	Freq
1	[noun] have become	4548
2	[pron] have become	2608
3	[noun sg] have become	2506
4	[pers pn] have become	1911
5	[noun pl] have become	1180
6	[noun prp] have become	776
7	it have become	775
8	it have become	775
9	[Wh det] have become	458
10	[conj] have become	366
11	he have become	357
12	he have become	354
13	which have become	317
14	which have become	317
15	[vb mod] have become	278
16	[modal v] have become	278
17	they have become	253
18	[adj] have become	242
19	they have become	239
20	[coord] have become	198
21	[Wh pn] have become	197
22	who have become	194
23	who have become	194
24	[verb] have become	178
25	i have become	176
26	she have become	176
27	i have become	175
28	she have become	172
29	[adv] have become	164
30	[that] have become	154