| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they 've been [v-ing] [noun sg] [prep] | 6 |
|
| 2 | they 've been [v-ing] [noun pl] [prep] | 6 |
|
| 3 | they 've been [v-ing] [noun] for | 6 |
|
