SN4 ""

No	Pattern	Freq
1	have had [art] [adj] effect	162
2	have had [art] [adj] effect	155
3	have had a [adj] effect	140
4	have had a [adj] effect	123
5	has had [art] [adj] effect	68
6	have had [art] [adj] effect	30
7	have had [art] [adj] effect	25
8	to have had [art] [adj] effect	19
9	have had [art] profound effect	18
10	have had [art] profound effect	18
11	have had an [adj] effect	17
12	have had the [adj] effect	15
13	have had the [adj] effect	15
14	had had [art] [adj] effect	13
15	have had [art] positive effect	8
16	have had [art] positive effect	8
17	's had [art] [adj] effect	7
18	have had [art] beneficial effect	7
19	have had no [adj] effect	7
20	have had [art] adverse effect	7
21	have had [art] dramatic effect	7
22	have had [art] beneficial effect	7
23	have had no [adj] effect	7
24	have had [art] dramatic effect	7
25	have had [art] adverse effect	7
26	have had [art] [det] effect	6
27	have had [art] significant effect	5
28	have had [art] devastating effect	5
29	have had [art] significant effect	5
30	have had [art] devastating effect	5