SN4 ""

No	Pattern	Freq
1	[verb] to have been at	23
2	[vb -s] to have been at	10
3	seem to have been at	8
4	[vb pp] to have been at	7
5	[adj] to have been at	6
6	seems to have been at	6
7	appear to have been at	6
8	[adj] to have been at	5
9	to have been [verb] at	65
10	to have been [vb pp] at	60
11	to have been [adj] at	16
12	to have been [adj] at	16
13	to have been [adv] at	6
14	to have been present at	5
15	to have been effect at	5
16	to have been [v-ing] at	5
17	to have been effected at	5
18	to have been present at	5
19	to have been at [art]	11
20	to have been at [art]	11
21	to have been at the	10
22	to have been at the	10
23	to have been at [adj]	7
24	to have been at [noun]	7
25	to have been at [noun sg]	5
26	to have been at least	5
27	to have been at [adv]	5
28	to have been at least	5
29	to have been at [adv]	5