SN4 ""

No	Pattern	Freq
31	have become a integral [noun]	10
32	have become a popular [noun]	10
33	have become a national [noun]	10
34	have become a [adj] force	10
35	have become a central [noun]	9
36	have become a [adj] factor	9
37	have become a central [noun]	9
38	have become a [adj] factor	9
39	have become a established [noun]	8
40	have become a real [noun]	8
41	have become a established [noun]	8
42	have become a familiar [noun]	8
43	have become a key [noun]	8
44	have become a real [noun]	8
45	have become a key [noun]	8
46	have become a familiar [noun]	8
47	have become a accepted [noun]	7
48	have become a international [noun]	7
49	have become a big [noun]	7
50	have become a international [noun]	7
51	have become a big [noun]	7
52	have become a accepted [noun]	7
53	have become a [adj] event	7
54	have become a [adj -er] [noun]	7
55	have become a [adj] [n mass]	7
56	have become a [adj] event	7
57	have become a significant [noun]	6
58	have become a essential [noun]	6
59	have become a essential [noun]	6
60	have become a [num ord] [noun]	6