SN4 ""

No	Pattern	Freq
1	have been [v-ing] for [noun]	270
2	[verb] been [v-ing] for [noun pl]	170
3	[vb base] been [v-ing] for [noun]	110
4	[vb past] been [v-ing] for [noun]	93
5	had been [v-ing] for [noun]	81
6	[verb] been [v-ing] for years	79
7	[verb] been [v-ing] for year	79
8	have been [v-ing] for [noun]	73
9	[verb] been [v-ing] for [noun sg]	54
10	[vb -s] been [v-ing] for [noun]	48
11	[verb] been [v-ing] for [noun prp]	39
12	've been [v-ing] for [noun]	37
13	has been [v-ing] for [noun]	32
14	[verb] been waiting for [noun]	23
15	[verb] been looking for [noun]	20
16	[vb infin] been [v-ing] for [noun]	16
17	's been [v-ing] for [noun]	16
18	[verb] been trying for [noun]	15
19	have been [v-ing] for [noun]	15
20	'd been [v-ing] for [noun]	12
21	[verb] been [v-ing] for ages	12
22	[verb] been [v-ing] for month	12
23	[verb] been [v-ing] for age	12
24	[verb] been [v-ing] for months	12
25	[verb] been doing for [noun]	12
26	[verb] been [v-ing] for days	10
27	[verb] been [v-ing] for day	10
28	[verb] been [v-ing] for week	9
29	[verb] been campaigning for [noun]	9
30	[verb] been working for [noun]	8