| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [v-ing] for [det] years | 19 |
|
| 2 | had been [v-ing] for some [noun pl] | 12 |
|
| 3 | had been [v-ing] for several [noun pl] | 10 |
|
| 4 | had been [v-ing] for many [noun pl] | 8 |
|
