SN4 ""

No	Pattern	Freq
1	a [noun sg] at the [noun]	3141
2	a [noun sg] at the [noun sg]	2549
3	a [noun sg] at the [adj]	849
4	a [noun sg] at the [adj]	617
5	a [noun sg] at the [noun prp]	360
6	a [noun sg] at the end	254
7	a [noun sg] at the end	254
8	a [noun sg] at the [noun pl]	210
9	a [noun sg] at the back	119
10	a [noun sg] at the back	119
11	a [noun sg] at the time	103
12	a [noun sg] at the time	102
13	a [noun sg] at the [num ord]	92
14	a [noun sg] at the door	89
15	a [noun sg] at the door	89
16	a [noun sg] at the moment	82
17	a [noun sg] at the moment	82
18	a [noun sg] at the top	73
19	a [noun sg] at the top	73
20	a [noun sg] at the [det]	69
21	a [noun sg] at the same	59
22	a [noun sg] at the university	59
23	a [noun sg] at the same	59
24	a [noun sg] at the university	59
25	a [noun sg] at the bottom	58
26	a [noun sg] at the bottom	58
27	a [noun sg] at the centre	40
28	a [noun sg] at the centre	40
29	a [noun sg] at the other	39
30	a [noun sg] at the beginning	39