SN4 ""

No	Pattern	Freq
1	[pers pn] [verb] have been [v-ing]	50
2	[pron] [verb] to have been [v-ing]	46
3	[pron] seem have been [v-ing]	33
4	[pron] [vb base] have been [v-ing]	22
5	[pron] [vb past] have been [v-ing]	20
6	[pron] [vb -s] have been [v-ing]	18
7	he [verb] have been [v-ing]	16
8	he [verb] have been [v-ing]	15
9	[pron] seems have been [v-ing]	13
10	[pron] seem have been [v-ing]	11
11	[pron] seemed have been [v-ing]	9
12	they [verb] have been [v-ing]	8
13	you [verb] have been [v-ing]	8
14	you [verb] have been [v-ing]	8
15	they [verb] have been [v-ing]	7
16	[pron] appear have been [v-ing]	7
17	[pron] [verb] has been [v-ing]	6
18	she [verb] have been [v-ing]	6
19	she [verb] have been [v-ing]	6
20	[pron] [verb] had been [v-ing]	6
21	i [verb] have been [v-ing]	5
22	i [verb] have been [v-ing]	5