SN4 ""

No	Pattern	Freq
1	had [det] effect [prep]	51
2	had [det] effect [prep]	51
3	had [det] effect on	37
4	had [det] effect on	37
5	had [det] effect upon	9
6	had [det] effect upon	9
7	[noun] had [det] effect	47
8	[noun sg] had [det] effect	28
9	[noun pl] had [det] effect	18
10	[pron] had [det] effect	16
11	[pers pn] had [det] effect	15
12	it had [det] effect	9
13	it had [det] effect	9
14	[adj] had [det] effect	7
15	[adv] had [det] effect	6
16	[adv] had [det] effect	6
17	they had [det] effect	5
18	they had [det] effect	5
19	[det] had [det] effect	5
20	had [art] [det] effect	17
21	had [art] [det] effect	17
22	had the [det] effect	13
23	had the [det] effect	13
24	had [verb] [det] effect	9
25	had [vb pp] [det] effect	8
26	had [adv] [det] effect	7
27	had [adv] [det] effect	7
28	had had [det] effect	6
29	had have [det] effect	6
30	had [det] [adj] effect	26