SN4 ""

No	Pattern	Freq
1	have been [v-ing] [adj] [noun pl]	217
2	have been [v-ing] [adj] [noun pl]	91
3	had been [v-ing] [adj] [noun pl]	83
4	has been [v-ing] [adj] [noun pl]	76
5	have been [v-ing] [det] [noun pl]	62
6	have been [v-ing] [num] [noun pl]	42
7	've been [v-ing] [adj] [noun pl]	40
8	have been making [adj] [noun pl]	17
9	have been [v-ing] these [noun pl]	15
10	have been [v-ing] these [noun pl]	15
11	have been doing [adj] [noun pl]	14
12	have been taking [adj] [noun pl]	14
13	have been [v-ing] [adj] years	14
14	have been [v-ing] some [noun pl]	13
15	have been [v-ing] some [noun pl]	13
16	have been using [adj] [noun pl]	13
17	have been [v-ing] [adj] [noun pl]	12
18	's been [v-ing] [adj] [noun pl]	11
19	'd been [v-ing] [adj] [noun pl]	10
20	have been [v-ing] two [noun pl]	8
21	have been [v-ing] more [noun pl]	8
22	have been [v-ing] other [noun pl]	8
23	have been [v-ing] more [noun pl]	8
24	have been [v-ing] two [noun pl]	8
25	have been [v-ing] other [noun pl]	8
26	have been waiting [adj] [noun pl]	7
27	have been [v-ing] new [noun pl]	7
28	have been [v-ing] new [noun pl]	7
29	have been [v-ing] [adj] problems	6
30	have been having [adj] [noun pl]	6