SN4 ""

No	Pattern	Freq
1	have been [adv] for [adj]	176
2	have been [adv] for [art]	134
3	have been [adv] for [art]	134
4	have been [adv] for a	100
5	have been [adv] for a	98
6	have been [adv] for [num]	94
7	have been [adv] for [adv]	79
8	have been [adv] for [adv]	78
9	have been [adv] for [noun]	76
10	have been [adv] for [det]	76
11	have been [adv] for [noun pl]	69
12	have been [adv] for some	43
13	have been [adv] for some	43
14	have been [adv] for the	34
15	have been [adv] for the	34
16	have been [adv] for year	25
17	have been [adv] for years	25
18	have been [adv] for [prep]	16
19	have been [adv] for [prep]	16
20	have been [adv] for two	15
21	have been [adv] for two	15
22	have been [adv] for six	12
23	have been [adv] for six	12
24	have been [adv] for many	12
25	have been [adv] for many	12
26	have been [adv] for [pron]	11
27	have been [adv] for about	10
28	have been [adv] for about	10
29	have been [adv] for more	10
30	have been [adv] for at	10