| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] not [prep] | 3098 |
|
| 2 | [was/were] [prep] an | 591 |
|
| 3 | [was/were] not an | 455 |
|
| 4 | not [prep] an | 299 |
|
