SN4 ""

No	Pattern	Freq
1	have been [v-ing] for a	215
2	have been [v-ing] for a	184
3	had been [v-ing] for a	72
4	have been [v-ing] for a	43
5	has been [v-ing] for a	37
6	have been [v-ing] for an	31
7	have been looking for a	27
8	've been [v-ing] for a	19
9	's been [v-ing] for a	18
10	'd been [v-ing] for a	18
11	have been waiting for a	17
12	have been trying for a	12
13	have been hoping for a	9
14	have been working for a	9
15	have been searching for a	8
16	have been pressing for a	8
17	have been running for a	7
18	have been campaigning for a	7
19	have been [v-ing] for a	6
20	have been going for a	6