SN4 ""

No	Pattern	Freq
1	[pron] have been [v-ing] about	301
2	[pers pn] have been [v-ing] about	288
3	i have been [v-ing] about	116
4	i have been [v-ing] about	116
5	we have been [v-ing] about	88
6	we have been [v-ing] about	88
7	[noun] have been [v-ing] about	68
8	[noun prp] have been [v-ing] about	30
9	you have been [v-ing] about	29
10	you have been [v-ing] about	29
11	he have been [v-ing] about	25
12	he have been [v-ing] about	25
13	[vb mod] have been [v-ing] about	22
14	[modal v] have been [v-ing] about	22
15	[noun sg] have been [v-ing] about	21
16	she have been [v-ing] about	18
17	she have been [v-ing] about	18
18	they have been [v-ing] about	12
19	they have been [v-ing] about	12
20	[noun pl] have been [v-ing] about	10
21	could have been [v-ing] about	6
22	could have been [v-ing] about	6
23	who have been [v-ing] about	6
24	[Wh pn] have been [v-ing] about	6
25	[n mass] have been [v-ing] about	6
26	who have been [v-ing] about	6
27	people have been [v-ing] about	5
28	[indef pn] have been [v-ing] about	5
29	must have been [v-ing] about	5
30	must have been [v-ing] about	5