| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] been [v-ing] [prep] | 1995 |
|
| 2 | been [v-ing] [prep] a | 665 |
|
| 3 | [vb base] been [v-ing] a | 274 |
|
| 4 | [vb base] [v-ing] [prep] a | 215 |
|
| 5 | [vb base] been [prep] a | 187 |
|
