SN4 ""

No	Pattern	Freq
1	[verb] to have been [adj] [prep]	225
2	[vb pp] to have been [adj] [prep]	91
3	seem to have been [adj] [prep]	82
4	[vb -s] to have been [adj] [prep]	65
5	seems to have been [adj] [prep]	47
6	appear to have been [adj] [prep]	36
7	[vb base] to have been [adj] [prep]	28
8	[vb infin] to have been [adj] [prep]	26
9	[adj] to have been [adj] [prep]	21
10	[adj] to have been [adj] [prep]	21
11	say to have been [adj] [prep]	19
12	said to have been [adj] [prep]	17
13	seem to have been [adj] [prep]	16
14	seem to have been [adj] [prep]	16
15	appears to have been [adj] [prep]	16
16	[vb past] to have been [adj] [prep]	15
17	believe to have been [adj] [prep]	13
18	allege to have been [adj] [prep]	12
19	[adv] to have been [adj] [prep]	12
20	believed to have been [adj] [prep]	12
21	likely to have been [adj] [prep]	10
22	likely to have been [adj] [prep]	10
23	think to have been [adj] [prep]	10
24	thought to have been [adj] [prep]	10
25	[noun] to have been [adj] [prep]	10
26	appear to have been [adj] [prep]	10
27	alleged to have been [adj] [prep]	10
28	[pron] to have been [adj] [prep]	8
29	appear to have been [adj] [prep]	8
30	known to have been [adj] [prep]	7