SN4 ""

No	Pattern	Freq
1	have been [adj] for [noun]	197
2	have been [adj] for [noun pl]	86
3	had been [adj] for [noun]	63
4	have been [adj] for [noun sg]	55
5	have been [adj] for [noun prp]	53
6	have been [adj] for [noun]	49
7	has been [adj] for [noun]	41
8	have been [adj] for years	25
9	have been [adj] for year	25
10	have been [adj] for [noun]	23
11	have been responsible for [noun]	18
12	have been good for [noun]	12
13	have been dead for [noun]	10
14	's been [adj] for [noun]	10
15	have been [adj] for century	8
16	have been necessary for [noun]	8
17	have been [adj] for centuries	8
18	have been available for [noun]	8
19	have been [adj] for hour	7
20	have been [adj] for hours	7
21	have been [adj] for months	7
22	have been [adj] for month	7
23	have been possible for [noun]	6
24	have been [adj] for britain	5
25	have been easy for [noun]	5
26	have been [adj] for britain	5
27	to have been [adj] for [noun]	5