SN4 ""

No	Pattern	Freq
1	have once been [noun]	40
2	[verb] once been [noun]	40
3	[vb past] once been [noun]	38
4	had once been [noun]	38
5	once have been [noun]	10
6	once [verb] been [noun]	10
7	once have been [noun]	9
8	once [vb infin] been [noun]	9
9	once been [art] [noun]	91
10	once been [art] [noun]	91
11	once been a [noun]	59
12	once been a [noun]	53
13	once been the [noun]	32
14	once been the [noun]	32
15	once been [pos pn] [noun]	12
16	once been [pron] [noun]	12
17	once been [noun] [noun]	8
18	once been [adj] [noun]	7
19	once been [adj] [noun]	6
20	once been his [noun]	6
21	once been his [noun]	6
22	once been an [noun]	6
23	once been [noun prp] [noun]	6
24	once been [noun] [prep]	12
25	once been [noun] [prep]	12
26	once been [noun] of	9
27	once been [noun] of	9
28	once been [noun] ['s]	8
29	once been [noun] [noun]	8
30	once been [noun] [unc]	8