| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [n mass] had been [adv] | 31 |
|
| 2 | people had been [adv] | 15 |
|
| 3 | staff had been [adv] | 9 |
|
| 4 | [n mass] had been [adv prt] | 8 |
|
| 5 | aircraft had been [adv] | 5 |
|
