SN4 ""

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