SN4 ""

No	Pattern	Freq
1	had [adv] been [v-ing]	373
2	have [adv] been [v-ing]	219
3	have just been [v-ing]	197
4	've [adv] been [v-ing]	184
5	has [adv] been [v-ing]	180
6	have also been [v-ing]	125
7	have already been [v-ing]	85
8	have [adv] been working	58
9	have recently been [v-ing]	54
10	'd [adv] been [v-ing]	54
11	have all been [v-ing]	53
12	have only been [v-ing]	53
13	have [adv] been talking	41
14	have [adv] been doing	40
15	have always been [v-ing]	35
16	's [adv] been [v-ing]	33
17	have obviously been [v-ing]	32
18	have [adv] been going	31
19	have actually been [v-ing]	30
20	have long been [v-ing]	29
21	have [adv] been looking	29
22	have probably been [v-ing]	28
23	have really been [v-ing]	26
24	have [adv] been waiting	25
25	have [adv] been trying	23
26	have both been [v-ing]	22
27	have still been [v-ing]	21
28	have now been [v-ing]	19
29	have [adv] been playing	18
30	have [adv] been saying	17