SN4 ""

No	Pattern	Freq
1	have been [verb] for a [adj]	216
2	have been [verb] for a [adj]	190
3	have been [verb] for a [adj]	176
4	have been [vb pp] for a [adj]	143
5	has been [verb] for a [adj]	73
6	have been [v-ing] for a [adj]	73
7	had been [verb] for a [adj]	63
8	have been [verb] for a long	44
9	have been [verb] for a long	44
10	have been [verb] for a [adj]	34
11	have been [verb] for an [adj]	26
12	have been [verb] for a [adj -er]	15
13	have been [verb] for a few	14
14	have been [verb] for a [det]	14
15	have been [verb] for a few	14
16	have been [verb] for a [adj]	13
17	have been [verb] for a further	11
18	have been [verb] for a far	11
19	have been look for a [adj]	10
20	have been looking for a [adj]	10
21	have been know for a [adj]	9
22	have been known for a [adj]	9
23	'd been [verb] for a [adj]	9
24	've been [verb] for a [adj]	8
25	's been [verb] for a [adj]	8
26	have been [verb] for a [num ord]	7
27	have been hope for a [adj]	6
28	have been extended for a [adj]	6
29	have been extend for a [adj]	6
30	have been hoping for a [adj]	6