SN4 ""

No	Pattern	Freq
1	have [been] [verb] at [det]	153
2	have been [verb] at [det]	153
3	have [been] [vb pp] at [det]	121
4	has [been] [verb] at [det]	39
5	have [been] [verb] at all	36
6	had [been] [verb] at [det]	34
7	have [been] [verb] at [det]	33
8	have [been] [verb] at some	31
9	have [been] [v-ing] at [det]	31
10	have [been] [verb] at [det]	27
11	have [been] look at [det]	20
12	have [been] looking at [det]	18
13	have [been] [verb] at that	18
14	have [been] [verb] at this	18
15	have [been] [verb] at any	12
16	've [been] [verb] at [det]	9
17	have [been] [verb] at several	9
18	have [been] [verb] at many	8
19	have [been] make at [det]	8
20	have [been] made at [det]	7
21	to have [been] [verb] at [det]	6
22	have [been] [verb] at each	6
23	have [been] see at [det]	5
24	have [been] seen at [det]	5