SN4 ""

No	Pattern	Freq
1	have been [v-ing] [noun pl]	689
2	have [been] [v-ing] [noun pl]	200
3	has [been] [v-ing] [noun pl]	153
4	had [been] [v-ing] [noun pl]	145
5	've [been] [v-ing] [noun pl]	87
6	have [been] making [noun pl]	42
7	have [been] [v-ing] [noun pl]	39
8	's [been] [v-ing] [noun pl]	32
9	have [been] [v-ing] things	30
10	'd [been] [v-ing] [noun pl]	27
11	have [been] taking [noun pl]	26
12	have [been] having [noun pl]	26
13	have [been] doing [noun pl]	16
14	have [been] writing [noun pl]	14
15	have [been] using [noun pl]	14
16	have [been] telling [noun pl]	14
17	have [been] visiting [noun pl]	12
18	have [been] [v-ing] problems	11
19	have [been] collecting [noun pl]	11
20	have [been] playing [noun pl]	11
21	have [been] selling [noun pl]	10
22	have [been] growing [noun pl]	9
23	have [been] [v-ing] ways	9
24	have [been] watching [noun pl]	9
25	have [been] hearing [noun pl]	9
26	have [been] developing [noun pl]	9
27	have [been] [v-ing] letters	9
28	have [been] running [noun pl]	8
29	have [been] holding [noun pl]	8
30	have [been] [v-ing] lessons	7