SN4 ""

No	Pattern	Freq
1	who have [adv] been	612
2	[Wh pn] had [adv] been	373
3	[Wh pn] has [adv] been	102
4	[Wh pn] have [adv] been	89
5	[Wh pn] have never been	88
6	[Wh pn] have already been	57
7	[Wh pn] have also been	52
8	[Wh pn] have previously been	47
9	[Wh pn] have always been	45
10	[Wh pn] have just been	43
11	[Wh pn] have once been	38
12	[Wh pn] have recently been	29
13	[Wh pn] 's [adv] been	27
14	[Wh pn] have long been	24
15	[Wh pn] 'd [adv] been	21
16	[Wh pn] have ever been	16
17	whom have [adv] been	14
18	[Wh pn] 've [adv] been	14
19	[Wh pn] have now been	13
20	[Wh pn] have hitherto been	13
21	[Wh pn] have only been	12
22	[Wh pn] have earlier been	11
23	[Wh pn] have actually been	9
24	[Wh pn] have probably been	7
25	[Wh pn] have since been	7
26	[Wh pn] have traditionally been	7
27	[Wh pn] have originally been	5
28	[Wh pn] have clearly been	5
29	[Wh pn] have obviously been	5
30	[Wh pn] have often been	5