| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | was n't there at the time | 5 |
|
| 2 | be n't there at the time | 5 |
|
| 3 | [be] n't there at the time | 5 |
|
| 4 | [was/were] n't there at the time | 5 |
|
