| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [v-ing] [prep] a | 582 |
|
| 2 | [v-ing] [prep] a long | 134 |
|
| 3 | been [prep] a long | 31 |
|
| 4 | been [v-ing] a long | 15 |
|
