| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] been [v-ing] for a | 90 |
|
| 2 | [vb past] been [v-ing] for [det] | 88 |
|
| 3 | been [v-ing] for a [det] | 12 |
|
| 4 | [vb past] [v-ing] for a [det] | 6 |
|
