SN4 ""

No	Pattern	Freq
1	have been [vb pp] at [noun]	459
2	have been [vb pp] at [noun prp]	231
3	had been [vb pp] at [noun]	145
4	have been [vb pp] at [noun sg]	140
5	has been [vb pp] at [noun]	139
6	have been [vb pp] at [noun]	114
7	have been [vb pp] at [n mass]	50
8	have been [vb pp] at [noun pl]	36
9	have been [vb pp] at [noun]	22
10	have been made at [noun]	20
11	have been found at [noun]	20
12	to have been [vb pp] at [noun]	15
13	have been held at [noun]	15
14	have been [vb pp] at home	14
15	have been [vb pp] at home	14
16	have been [vb pp] at sea	12
17	have been [vb pp] at length	12
18	have been [vb pp] at sea	12
19	have been [vb pp] at length	12
20	have been arrested at [noun]	11
21	have been educated at [noun]	11
22	have been born at [noun]	10
23	having been [vb pp] at [noun]	10
24	have been [vb pp] at time	9
25	have been established at [noun]	9
26	have been recorded at [noun]	9
27	have been [vb pp] at times	8
28	have been put at [noun]	8
29	have been [vb pp] at gunpoint	7
30	have been discussed at [noun]	7