| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [pron] a | 763 |
|
| 2 | [was/were] doing [pron] | 531 |
|
| 3 | [was/were] doing a | 174 |
|
| 4 | doing [pron] a | 101 |
|
