| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [not/n't] [prep] | 4716 |
|
| 2 | [was/were] [not/n't] an | 597 |
|
| 3 | [was/were] [prep] an | 591 |
|
| 4 | [not/n't] [prep] an | 305 |
|
