SN4 ""

No	Pattern	Freq
1	[pron] have been [v-ing] on	296
2	[pers pn] have been [v-ing] on	234
3	[pron] had been [v-ing] on	104
4	[pron] have been working on	91
5	i have been [v-ing] on	63
6	i have been [v-ing] on	62
7	[pron] 've been [v-ing] on	61
8	he have been [v-ing] on	55
9	he have been [v-ing] on	55
10	[pron] have been [v-ing] on	43
11	[Wh pn] have been [v-ing] on	38
12	who have been [v-ing] on	38
13	who have been [v-ing] on	38
14	we have been [v-ing] on	35
15	we have been [v-ing] on	35
16	[pron] has been [v-ing] on	32
17	[pron] 'd been [v-ing] on	31
18	she have been [v-ing] on	30
19	she have been [v-ing] on	29
20	[pron] 's been [v-ing] on	25
21	they have been [v-ing] on	24
22	they have been [v-ing] on	23
23	[pron] have been sitting on	21
24	it have been [v-ing] on	20
25	it have been [v-ing] on	20
26	[Wh det] have been [v-ing] on	18
27	[pron] have been going on	15
28	[pron] have been living on	14
29	[pron] have been concentrating on	14
30	which have been [v-ing] on	12