SN4 ""

No	Pattern	Freq
1	have [vb pp] to be	2907
2	have get to be	1113
3	have got to be	1110
4	has [verb] to be	678
5	had [verb] to be	587
6	have [verb] to be	520
7	've [verb] to be	472
8	's [verb] to be	452
9	have have to be	290
10	have prove to be	290
11	have had to be	285
12	have proved to be	277
13	have come to be	211
14	have come to be	210
15	have [verb] to be	194
16	have ceased to be	117
17	have cease to be	117
18	have tended to be	110
19	have tend to be	110
20	have [to-vb] to be	56
21	have continued to be	54
22	have continue to be	54
23	have seemed to be	46
24	have seem to be	46
25	have want to be	44
26	'd [verb] to be	44
27	have expect to be	43
28	have appeared to be	42
29	have appear to be	42
30	have wanted to be	42