| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [v-ing] [prep] a | 94 |
|
| 2 | he has been [v-ing] [prep] | 75 |
|
| 3 | he has been [v-ing] a | 13 |
|
| 4 | he has been [prep] a | 5 |
|
