SN4 ""

No	Pattern	Freq
1	[verb] have been [adv]	654
2	[verb] to have [been] [adv]	524
3	seem have [been] [adv]	238
4	[vb -s] have [been] [adv]	217
5	[vb pp] have [been] [adv]	191
6	seems have [been] [adv]	139
7	[vb base] have [been] [adv]	121
8	appear have [been] [adv]	120
9	appears have [been] [adv]	68
10	seem have [been] [adv]	64
11	[vb past] have [been] [adv]	62
12	[verb] has [been] [adv]	48
13	[verb] have [been] very	46
14	[verb] had [been] [adv]	43
15	[vb infin] have [been] [adv]	41
16	[verb] have [been] more	41
17	say have [been] [adv]	39
18	appear have [been] [adv]	30
19	[verb] have [been] [adv]	29
20	said have [been] [adv]	28
21	seem have [been] [adv]	23
22	[verb] have [been] particularly	21
23	[verb] have [been] largely	20
24	believe have [been] [adv]	20
25	[verb] have [been] as	16
26	believed have [been] [adv]	16
27	know have [been] [adv]	16
28	think have [been] [adv]	16
29	[verb] have [been] much	15
30	reported have [been] [adv]	14