SN4 ""

No	Pattern	Freq
1	[vb mod] [prep] been	422
2	[modal v] [prep] been	422
3	must [prep] been	147
4	must [prep] been	147
5	would [prep] been	131
6	would [prep] been	112
7	could [prep] been	61
8	could [prep] been	61
9	[adv] [prep] been	54
10	should [prep] been	45
11	should [prep] been	45
12	not [prep] been	42
13	[not/n't] [prep] been	42
14	n't [prep] been	35
15	might [prep] been	30
16	might [prep] been	30
17	[noun] [prep] been	20
18	'd [prep] been	19
19	[noun sg] [prep] been	19
20	[verb] [prep] been	18
21	have [prep] been	13
22	sort [prep] been	12
23	[adv] [prep] been	12
24	sort [prep] been	12
25	[vb past] [prep] been	9
26	had [prep] been	8
27	not [prep] been	7
28	may [prep] been	7
29	may [prep] been	7
30	[pron] [prep] been	6