SN4 ""

No	Pattern	Freq
1	have been [v-ing] for a [noun sg]	128
2	[verb] been [v-ing] for a [noun sg]	106
3	[vb past] been [v-ing] for a [noun sg]	50
4	had been [v-ing] for a [noun sg]	41
5	[vb base] been [v-ing] for a [noun sg]	40
6	[vb -s] been [v-ing] for a [noun sg]	35
7	have been [v-ing] for a [noun sg]	29
8	has been [v-ing] for a [noun sg]	23
9	[verb] been [v-ing] for an [noun sg]	22
10	[verb] been looking for a [noun sg]	15
11	[verb] been waiting for a [noun sg]	14
12	's been [v-ing] for a [noun sg]	12
13	've been [v-ing] for a [noun sg]	11
14	[verb] been [v-ing] for a year	11
15	'd been [v-ing] for a [noun sg]	9
16	[verb] been trying for a [noun sg]	8
17	[verb] been [v-ing] for a while	8
18	[verb] been working for a [noun sg]	6
19	[verb] been searching for a [noun sg]	6
20	[verb] been [v-ing] for a week	6
21	[verb] been campaigning for a [noun sg]	5
22	[verb] been [v-ing] for a number	5
23	[verb] been [v-ing] for a excuse	5
24	[verb] been [v-ing] for a hour	5
25	[verb] been running for a [noun sg]	5