| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] [been] [v-ing] a | 204 |
|
| 2 | [vb -s] [been] [v-ing] on | 120 |
|
| 3 | [been] [v-ing] on a | 61 |
|
| 4 | [vb -s] [been] on a | 26 |
|
| 5 | [vb -s] [v-ing] on a | 6 |
|
