| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [v-ing] [noun] | 429 |
|
| 2 | has been [v-ing] for | 270 |
|
| 3 | been [v-ing] [noun] for | 209 |
|
| 4 | has been [noun] for | 20 |
|
