SN4 ""

No	Pattern	Freq
1	been [v-ing] [adv] since	76
2	been [v-ing] [adv] since	49
3	been [v-ing] [noun] since	29
4	been [v-ing] [adv prt] since	27
5	been [v-ing] on since	18
6	been [v-ing] on since	18
7	been [v-ing] [noun sg] since	13
8	been [v-ing] [noun pl] since	12
9	been [v-ing] [pron] since	11
10	been [v-ing] [pers pn] since	10
11	been [v-ing] place since	6
12	been [v-ing] [prep] since	6
13	been [v-ing] steadily since	6
14	been [v-ing] [prep] since	6
15	been [v-ing] steadily since	6
16	been [v-ing] ever since	6
17	been [v-ing] place since	6
18	been [v-ing] ever since	6
19	[verb] been [v-ing] since	145
20	have been [v-ing] since	145
21	[vb -s] been [v-ing] since	57
22	[vb past] been [v-ing] since	54
23	has been [v-ing] since	51
24	had been [v-ing] since	49
25	[vb base] been [v-ing] since	32
26	have been [v-ing] since	23
27	've been [v-ing] since	9
28	's been [v-ing] since	6
29	[adv] been [v-ing] since	6
30	'd been [v-ing] since	5