SN4 ""

No	Pattern	Freq
1	[verb] to have been	14
2	to [noun] have been	289
3	to [noun sg] have been	133
4	to [pron] have been	123
5	to [noun prp] have been	98
6	to [adj] have been	67
7	to [Wh det] have been	59
8	to what have been	53
9	to what have been	53
10	to [pers pn] have been	52
11	to [noun pl] have been	47
12	to [num] have been	36
13	to date have been	34
14	to date have been	34
15	to [det] have been	28
16	to this have been	22
17	to this have been	22
18	to [adv] have been	21
19	to [adv] have been	21
20	to i have been	15
21	to me have been	15
22	to he have been	11
23	to now have been	11
24	to now have been	11
25	to him have been	10
26	to [n mass] have been	10
27	to them have been	8
28	to they have been	8
29	to [Wh pn] have been	7
30	to which have been	6