| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [was/were] [v-ing] [prep] | 817 |
|
| 2 | [conj] [was/were] [v-ing] [prep] | 802 |
|
| 3 | [conj] [was/were] [verb] at | 347 |
|
| 4 | [conj] [be] [v-ing] at | 112 |
|
| 5 | [conj] [was/were] [v-ing] at | 64 |
|
