SN4 ""

No	Pattern	Freq
1	[verb] an [noun] for [noun]	561
2	[prep] an [noun] for [noun]	397
3	[prep] an [noun] for [noun]	397
4	[be] an [noun] for [noun]	134
5	be an [noun] for [noun]	134
6	[vb past] an [noun] for [noun]	124
7	[to-vb] an [noun] for [noun]	97
8	as an [noun] for [noun]	94
9	as an [noun] for [noun]	94
10	[adv] an [noun] for [noun]	86
11	[vb infin] an [noun] for [noun]	78
12	[conj] an [noun] for [noun]	74
13	[vb pp] an [noun] for [noun]	73
14	[v-ing] an [noun] for [noun]	72
15	provide an [noun] for [noun]	68
16	[vb -s] an [noun] for [noun]	65
17	have an [noun] for [noun]	63
18	of an [noun] for [noun]	63
19	of an [noun] for [noun]	63
20	make an [noun] for [noun]	54
21	[is] an [noun] for [noun]	53
22	[adv] an [noun] for [noun]	52
23	[vb base] an [noun] for [noun]	52
24	to an [noun] for [noun]	49
25	to an [noun] for [noun]	49
26	is an [noun] for [noun]	46
27	with an [noun] for [noun]	44
28	with an [noun] for [noun]	44
29	in an [noun] for [noun]	40
30	in an [noun] for [noun]	40