SN4 ""

No	Pattern	Freq
1	have been [v-ing] for [prep]	26
2	've been [v-ing] [prep] [prep]	22
3	have been [v-ing] [prep] for	21
4	had been [v-ing] [prep] [prep]	19
5	have been [v-ing] [prep] [prep]	14
6	have been [v-ing] with [prep]	14
7	have been [v-ing] [prep] in	13
8	have been looking [prep] [prep]	12
9	have been [v-ing] at [prep]	11
10	have been [v-ing] about [prep]	9
11	has been [v-ing] [prep] [prep]	8
12	have been working [prep] [prep]	8
13	have been [v-ing] [prep] at	8
14	'd been [v-ing] [prep] [prep]	7
15	have been talking [prep] [prep]	6
16	have been [v-ing] [prep] over	5
17	have been waiting [prep] [prep]	5
18	have been [v-ing] [prep] since	5
19	have been [v-ing] [prep] on	5