| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they have been [v-ing] for [noun pl] | 11 |
|
| 2 | they have been [v-ing] for years | 7 |
|
| 3 | they had been [v-ing] for [noun pl] | 6 |
|
| 4 | they 've been [v-ing] for [noun pl] | 5 |
|
