SN4 ""

No	Pattern	Freq
1	had [vb pp] [prep] an	412
2	has [vb pp] [prep] an	270
3	have [vb pp] to an	263
4	have [vb pp] in an	181
5	have [vb pp] [prep] an	149
6	have come [prep] an	128
7	have [vb pp] [prep] an	98
8	have [vb pp] for an	92
9	have [vb pp] as an	89
10	have [vb pp] from an	79
11	have led [prep] an	75
12	have [vb pp] into an	70
13	have [vb pp] with an	61
14	to have [vb pp] [prep] an	46
15	have resulted [prep] an	45
16	have [vb pp] at an	44
17	have [vb pp] on an	40
18	've [vb pp] [prep] an	27
19	have called [prep] an	27
20	have worked [prep] an	25
21	have [vb pp] by an	23
22	have developed [prep] an	19
23	having [vb pp] [prep] an	18
24	have [vb pp] through an	18
25	have grown [prep] an	18
26	have gone [prep] an	17
27	have [vb pp] like an	15
28	have died [prep] an	15
29	have asked [prep] an	15
30	's [vb pp] [prep] an	15