SN4 ""

No	Pattern	Freq
1	[verb] an [noun] for [adj]	333
2	[prep] an [noun] for [adj]	249
3	[prep] an [noun] for [adj]	249
4	be an [noun] for [adj]	100
5	[be] an [noun] for [adj]	100
6	as an [noun] for [adj]	73
7	as an [noun] for [adj]	73
8	[vb past] an [noun] for [adj]	62
9	[to-vb] an [noun] for [adj]	56
10	[vb infin] an [noun] for [adj]	55
11	provide an [noun] for [adj]	50
12	[conj] an [noun] for [adj]	46
13	[vb pp] an [noun] for [adj]	41
14	[vb base] an [noun] for [adj]	41
15	[v-ing] an [noun] for [adj]	41
16	in an [noun] for [adj]	39
17	in an [noun] for [adj]	39
18	have an [noun] for [adj]	39
19	[vb -s] an [noun] for [adj]	37
20	[adv] an [noun] for [adj]	36
21	[is] an [noun] for [adj]	35
22	be an [noun] for [adj]	33
23	[be] an [noun] for [adj]	33
24	of an [noun] for [adj]	33
25	of an [noun] for [adj]	33
26	[coord] an [noun] for [adj]	32
27	is an [noun] for [adj]	29
28	with an [noun] for [adj]	29
29	with an [noun] for [adj]	29
30	make an [noun] for [adj]	26