SN4 ""

No	Pattern	Freq
1	have already been	713
2	have also been	695
3	have always been	506
4	have never been	489
5	have now been	373
6	have all been	253
7	have recently been	214
8	have long been	180
9	have often been	162
10	have just been	114
11	have since been	98
12	have traditionally been	95
13	have ever been	91
14	have only been	67
15	have yet been	59
16	have previously been	59
17	have sometimes been	56
18	have actually been	53
19	have generally been	50
20	have even been	49
21	have both been	47
22	have frequently been	39
23	have usually been	39
24	have subsequently been	36
25	have probably been	34
26	have therefore been	30
27	have certainly been	27
28	have hitherto been	25
29	have rarely been	23
30	have largely been	22