| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [verb] off | 1381 |
|
| 2 | [was/were] [vb pp] off | 1105 |
|
| 3 | [be] sealed off | 42 |
|
| 4 | [was/were] sealed [adv] | 31 |
|
| 5 | [was/were] seal off | 25 |
|
