| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [v-ing] [prep] a | 2555 |
|
| 2 | [v-ing] [prep] a [num ord] | 143 |
|
| 3 | [was/were] [v-ing] [prep] [num ord] | 43 |
|
| 4 | [was/were] [v-ing] a [num ord] | 17 |
|
| 5 | [was/were] [prep] a [num ord] | 16 |
|
