SN4 ""

No	Pattern	Freq
1	[verb] to have been [noun]	92
2	[vb pp] to have been [noun]	35
3	seem to have been [noun]	35
4	[vb -s] to have been [noun]	24
5	[vb base] to have been [noun]	22
6	seems to have been [noun]	19
7	appear to have been [noun]	15
8	[adj] to have been [noun]	15
9	[adj] to have been [noun]	14
10	seem to have been [noun]	10
11	appear to have been [noun]	10
12	think to have been [noun]	8
13	thought to have been [noun]	8
14	be to have been [noun]	7
15	[was/were] to have been [noun]	7
16	[adv] to have been [noun]	7
17	[be] to have been [noun]	7
18	was to have been [noun]	7
19	believe to have been [noun]	7
20	[pron] to have been [noun]	7
21	[noun] to have been [noun]	6
22	believed to have been [noun]	6
23	[vb infin] to have been [noun]	6
24	likely to have been [noun]	5
25	say to have been [noun]	5
26	[vb past] to have been [noun]	5
27	said to have been [noun]	5
28	likely to have been [noun]	5
29	to have been [art] [noun]	408
30	to have been [art] [noun]	408