SN4 ""

No	Pattern	Freq
1	[was/were] [prep] [noun] at the [noun]	94
2	[was/were] [prep] [noun] at the [noun sg]	87
3	was [prep] [noun] at the [noun]	68
4	[was/were] [prep] [noun sg] at the [noun]	63
5	[was/were] in [noun] at the [noun]	54
6	[was/were] in [noun] at the [noun]	54
7	[was/were] [prep] [noun] at the time	50
8	[was/were] [prep] [noun] at the time	50
9	were [prep] [noun] at the [noun]	26
10	[was/were] on [noun] at the [noun]	25
11	[was/were] on [noun] at the [noun]	25
12	[was/were] [prep] [noun prp] at the [noun]	22
13	[was/were] [prep] [noun] at the end	8
14	[was/were] [prep] [noun pl] at the [noun]	8
15	[was/were] [prep] [noun] at the end	8
16	[was/were] [prep] duty at the [noun]	6
17	[was/were] with [noun] at the [noun]	6
18	[was/were] [prep] duty at the [noun]	6
19	[was/were] with [noun] at the [noun]	6
20	[was/were] [prep] [noun] at the [noun prp]	5