SN4 ""

No	Pattern	Freq
31	have been growing [noun]	19
32	have been [adj] concern	19
33	have been various [noun]	19
34	have been [adj] developments	17
35	having been [adj] [noun]	17
36	have been extensive [noun]	17
37	have been [adj] secretary	16
38	have been [adj] [n mass]	16
39	have been chief [noun]	16
40	have been [adj] discussion	15
41	'd been [adj] [noun]	15
42	have been [adj] secretary	15
43	have been [adj] years	15
44	have been [adj] criticism	15
45	have been old [noun]	14
46	have been common [noun]	14
47	have been [adj] attempt	14
48	have been [adj] friend	14
49	have been [adj] friends	14
50	have been [adj] attempts	14
51	have been long [noun]	13
52	have been serious [noun]	13
53	have been frequent [noun]	13
54	have been [adj] pressure	13
55	have been sufficient [noun]	13
56	have been regular [noun]	13
57	have been substantial [noun]	12
58	have been important [noun]	12
59	have been [adj] discussion	11
60	have been recent [noun]	11