SN4 ""

No	Pattern	Freq
31	have been [adj] report	17
32	have been [adj] reports	17
33	have been significant [noun]	17
34	have been significant [noun]	17
35	have been various [noun]	14
36	have been various [noun]	14
37	have been three [noun]	13
38	have been three [noun]	13
39	have been [adj] [noun prp]	13
40	have been [adj] example	12
41	have been [adj] examples	12
42	have been great [noun]	11
43	have been busy [noun]	11
44	have been great [noun]	11
45	have been busy [noun]	11
46	have been [adj] case	11
47	have been [adj] year	11
48	have been [adj] improvement	10
49	have been [adj] improvements	10
50	have been [adj] cases	10
51	have been good [noun]	10
52	have been far [noun]	10
53	have been frequent [noun]	10
54	have been important [noun]	10
55	have been further [noun]	10
56	have been [adj] years	10
57	have been frequent [noun]	10
58	have been important [noun]	10
59	have been regular [noun]	9
60	have been [adj] instance	9