SN4 ""

No	Pattern	Freq
1	[verb] at [prep] [det]	100
2	look at [prep] [det]	59
3	[vb pp] at [prep] [det]	55
4	looked at [prep] [det]	35
5	[noun] at [prep] [det]	26
6	[vb past] at [prep] [det]	20
7	[noun sg] at [prep] [det]	18
8	[v-ing] at [prep] [det]	14
9	looking at [prep] [det]	11
10	arrive at [prep] [det]	10
11	[adv] at [prep] [det]	9
12	be at [prep] [det]	9
13	[be] at [prep] [det]	9
14	looked at [prep] [det]	7
15	[conj] at [prep] [det]	7
16	[was/were] at [prep] [det]	6
17	was at [prep] [det]	6
18	arrived at [prep] [det]	6
19	[to-vb] at [prep] [det]	6
20	[adv] at [prep] [det]	5
21	that at [prep] [det]	5
22	that at [prep] [det]	5
23	[that] at [prep] [det]	5
24	at [noun] [prep] [det]	719
25	at [noun sg] [prep] [det]	390
26	at [adj] [prep] [det]	333
27	at [pron] [prep] [det]	332
28	at [pers pn] [prep] [det]	301
29	at [adv] [prep] [det]	280
30	at [adv] [prep] [det]	279