| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] had been [v-ing] | 435 |
|
| 2 | had been [v-ing] [adv prt] | 344 |
|
| 3 | [noun pl] had been [adv prt] | 32 |
|
| 4 | [noun pl] been [v-ing] [adv prt] | 7 |
|
