SN4 ""

No	Pattern	Freq
1	they had been [v-ing] [prep]	108
2	they have been [v-ing] for	84
3	they 've been [v-ing] [prep]	71
4	they have been [v-ing] [prep]	52
5	they have been [v-ing] in	42
6	they have been [v-ing] on	23
7	they 'd been [v-ing] [prep]	21
8	they have been working [prep]	20
9	they have been waiting [prep]	19
10	they have been [v-ing] with	16
11	they have been [v-ing] at	15
12	they have been talking [prep]	13
13	they have been [v-ing] about	12
14	they have been [v-ing] to	11
15	they have been living [prep]	10
16	they have been doing [prep]	9
17	they have been [v-ing] since	9
18	they have been sitting [prep]	8
19	they have been [v-ing] from	7
20	they have been fighting [prep]	7
21	they have been [v-ing] against	6
22	they have been looking [prep]	6
23	they have been going [prep]	5
24	they have been walking [prep]	5