| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] [verb] for a | 564 |
|
| 2 | [v-ing] [verb] for a | 110 |
|
| 3 | [v-ing] [been] [verb] for | 54 |
|
| 4 | [v-ing] [been] [verb] a | 23 |
|
