SN4 ""

No	Pattern	Freq
31	[conj] have been [noun]	98
32	could have been [noun]	94
33	could have been [noun]	94
34	they have been [noun]	91
35	they have been [noun]	86
36	[det] have been [noun]	80
37	[Wh det] have been [noun]	70
38	i have been [noun]	54
39	i have been [noun]	54
40	which have been [noun]	53
41	which have been [noun]	53
42	we have been [noun]	52
43	[vb pp] have been [noun]	51
44	[coord] have been [noun]	50
45	we have been [noun]	49
46	she have been [noun]	45
47	she have been [noun]	43
48	that have been [noun]	42
49	that have been [noun]	42
50	[that] have been [noun]	42
51	not have been [noun]	41
52	[not/n't] have been [noun]	41
53	[num] have been [noun]	41
54	should have been [noun]	39
55	should have been [noun]	39
56	and have been [noun]	36
57	and have been [noun]	36
58	seem have been [noun]	35
59	there have been [noun]	32
60	there have been [noun]	32