| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun prp] [prep] a | 15457 |
|
| 2 | [was/were] [prep] a | 5878 |
|
| 3 | [noun prp] [was/were] a | 5228 |
|
| 4 | [noun prp] [was/were] [prep] | 5145 |
|
