SN4 ""

No	Pattern	Freq
1	[verb] [adv] been doing	40
2	have [adv] been doing	40
3	[vb base] [adv] been doing	21
4	've [adv] been doing	15
5	[vb past] [adv] been doing	14
6	had [adv] been doing	12
7	have [adv] been doing	6
8	[vb -s] [adv] been doing	5
9	[adv] have been doing	7
10	[adv] [verb] been doing	7
11	[adv] have been doing	5
12	[adv] [vb infin] been doing	5
13	[adv] been doing [pron]	10
14	[adv] been doing [art]	8
15	[adv] been doing [art]	8
16	[adv] been doing [adj]	7
17	[adv] been doing [prep]	7
18	[adv] been doing [det]	7
19	[adv] been doing [prep]	7
20	[adv] been doing [pos pn]	5
21	[adv] been doing the	5
22	[adv] been doing the	5