| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] been [verb] [pron] [prep] a | 8 |
|
| 2 | [vb -s] be [v-ing] [pron] [prep] a | 7 |
|
| 3 | has be [verb] [pron] [prep] a | 6 |
|
